---
product_id: 24719914
title: "KTSB15 Step Drill Bit #15 Double Fluted 7/8 to 1-3/8-Inch with Easy-to-Read Step Markings and Targets, 3/8-Inch Hex Shank"
brand: "klein tools"
price: "€ 107.63"
currency: EUR
in_stock: true
reviews_count: 13
category: "Klein Tools"
url: https://www.desertcart.at/products/24719914-ktsb15-step-drill-bit-15-double-fluted-7-8-to
store_origin: AT
region: Austria
---

# Laser-etched step markings for precision 3/8-inch hex shank for secure grip 10x durability with AlTiN coating KTSB15 Step Drill Bit #15 Double Fluted 7/8 to 1-3/8-Inch with Easy-to-Read Step Markings and Targets, 3/8-Inch Hex Shank

**Brand:** klein tools
**Price:** € 107.63
**Availability:** ✅ In Stock

## Summary

> 🔧 Drill Like a Pro, Last Like a Legend

## Quick Answers

- **What is this?** KTSB15 Step Drill Bit #15 Double Fluted 7/8 to 1-3/8-Inch with Easy-to-Read Step Markings and Targets, 3/8-Inch Hex Shank by klein tools
- **How much does it cost?** € 107.63 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/24719914-ktsb15-step-drill-bit-15-double-fluted-7-8-to)

## Best For

- klein tools enthusiasts

## Why This Product

- Trusted klein tools brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rock-Solid Grip:** Thick 3/8-inch hex shank prevents slippage and rounding, giving you total control under pressure.
- • **Unmatched Durability:** Aluminum titanium nitride coating lasts 10x longer than standard bits, built for relentless pros.
- • **Pro-Grade Performance:** Non-walking tip starts fast and drills clean, perfect for stainless steel, sheet metal, and more.
- • **Clean, Effortless Cuts:** Double fluted design removes chips fast, delivering smooth, burr-free holes in metal and plastic.
- • **Precision at Every Step:** Laser-etched markings ensure you hit the exact hole size every time—no guesswork, no waste.

## Overview

The Klein Tools KTSB15 Step Drill Bit #15 features a double-fluted design with a durable aluminum titanium nitride coating that extends bit life by 10x. Its 3/8-inch hex shank ensures a secure grip, while laser-etched step markings provide precise hole sizing from 7/8 to 1-3/8 inches. Engineered for clean, chip-free cuts and professional-grade durability, this bit is ideal for stainless steel, sheet metal, and plastic, making it a must-have for professionals and serious DIYers alike.

## Description

Straight, Double Fluted Step Drill Bits from Klein Tools provide cleaner cutting and drilling. The aluminum titanium coating is 10 times more durable than steamed black oxide for longer bit life. 3/8-Inch hex shank is durable, and has a firm, positive grip. Laser-etched markings provide quick size identification on primary holes. This step bit has 3-hole sizes from 7/8-Inch to 1-3/8-Inch (22.2 to 34.9 mm). For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.

Review: Cuts Like Butter — Sharp, Durable, and Perfect for Clean Holes! - This step drill bit is outstanding — fast, sharp, and built to last. It cuts through metal like a hot knife through butter, even at low drill speeds, making it perfect for clean, precise hole expansion in stainless steel, sheet metal, and other tough materials. Many reviewers mentioned how surprised they were at how quickly it cuts, even on the first try. Performance: The bit delivers smooth, fast cuts with minimal effort. It’s especially effective on stainless steel when paired with proper cutting fluid or cooling techniques. The stepped design provides excellent control, allowing you to stop at the exact size you need without over-cutting. Even after dozens of holes, it stays sharp and efficient. Build Quality: This is a professional-grade bit — sturdy, well-machined, and extremely durable. Users have reported drilling over 100 holes with no noticeable dulling. It’s a tool worth the investment, especially compared to cheaper brands that chip or wear out quickly. Ease of Use: The bit works best at low speed to prevent overheating or chipping. A little lubricant or water cooling makes a big difference. It’s ideal for projects like sink installations, drain pans, electrical boxes, and sheet metal work. Sharp, smooth cutting through tough materials Ideal for stainless steel, sheet metal, and PVC Durable and stays sharp after many uses Precise step sizing for clean, accurate holes Works best with low speed and cutting fluid Professional-grade quality worth the price This step drill bit isn’t just another tool — it’s one of those buy-it-once, use-it-forever kind of products. Perfect for pros and DIYers alike who want precision and long-lasting performance.
Review: Tuff job done with ease - high quality tool for drilling hole in steel sink to install DIY under sink water filter.

## Features

- DURABLE COATING: Step bits are coated with aluminum titanium nitride, providing a durability that is 10 times greater than black oxide, ensuring an extended bit lifespan
- CLEAN CUTS: Two straight flutes on this Step Drill Bit provide chip removal and cleaner cuts
- SECURE GRIP WITH DURABLE HEX SHANK: The thick 3/8-Inch hex shank prevents rounding out in the drill chuck, providing a more positive grip and secure operation
- LASER-ETCHED MARKINGS: High-visibility markings are provided for primary hole sizes, making it easy to identify the desired hole size and achieve accurate drilling
- NON-WALKING DRILL TIP: The fast-starting, non-walking drill tip ensures precise and accurate drilling, allowing for clean and professional results

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0171X0S0A |
| Best Sellers Rank | #9,205 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #19 in Step Drill Bits |
| Brand | KLEIN TOOLS |
| Brand Name | KLEIN TOOLS |
| Customer Reviews | 4.7 out of 5 stars 1,937 Reviews |
| Cutting Diameter | 22.23 millimeters |
| Finish Type | Silver |
| Finish Types | Silver |
| Global Trade Identification Number | 00092644591150 |
| Included Components | KTSB15 |
| Item Dimensions | 5.2 x 3.4 x 0.7 inches |
| Item Type Name | Klein Tools Step Drill Bit #15 Double Fluted 7/8 to 1-3/8-Inch KTSB15 |
| Item Weight | 7.4 ounces |
| Item dimensions L x W x H | 5.2 x 3.4 x 0.7 inches |
| Manufacturer | Klein Tools |
| Material | M2 Steel |
| Material Type | M2 Steel |
| Minimum Bore Diameter | 0.88 inches |
| Model | KTSB15 |
| Number of Flutes | 2 |
| Number of Packs | 1 |
| Number of Pieces | 3 |
| Part Number | KTSB15 |
| Point Style | Step Point |
| Set Name | 3-hole sizes |
| Shank Type | Hex |
| Surface Recommendation | Steel, Aluminum, Wood, Plastic |
| Tool Flute Type | Straight |
| UPC | 092644591150 |
| Unit Count | 1 Count |
| Warranty Description | 1 year manufacturer |

## Product Details

- **Brand:** KLEIN TOOLS
- **Cutting Diameter:** 22.23 Millimeters
- **Finish Type:** Silver
- **Material:** M2 Steel
- **Shank Type:** Hex

## Images

![KTSB15 Step Drill Bit #15 Double Fluted 7/8 to 1-3/8-Inch with Easy-to-Read Step Markings and Targets, 3/8-Inch Hex Shank - Image 1](https://m.media-amazon.com/images/I/51LeOxKiGIL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Cuts Like Butter — Sharp, Durable, and Perfect for Clean Holes!
*by B***N on October 24, 2025*

This step drill bit is outstanding — fast, sharp, and built to last. It cuts through metal like a hot knife through butter, even at low drill speeds, making it perfect for clean, precise hole expansion in stainless steel, sheet metal, and other tough materials. Many reviewers mentioned how surprised they were at how quickly it cuts, even on the first try. Performance: The bit delivers smooth, fast cuts with minimal effort. It’s especially effective on stainless steel when paired with proper cutting fluid or cooling techniques. The stepped design provides excellent control, allowing you to stop at the exact size you need without over-cutting. Even after dozens of holes, it stays sharp and efficient. Build Quality: This is a professional-grade bit — sturdy, well-machined, and extremely durable. Users have reported drilling over 100 holes with no noticeable dulling. It’s a tool worth the investment, especially compared to cheaper brands that chip or wear out quickly. Ease of Use: The bit works best at low speed to prevent overheating or chipping. A little lubricant or water cooling makes a big difference. It’s ideal for projects like sink installations, drain pans, electrical boxes, and sheet metal work. Sharp, smooth cutting through tough materials Ideal for stainless steel, sheet metal, and PVC Durable and stays sharp after many uses Precise step sizing for clean, accurate holes Works best with low speed and cutting fluid Professional-grade quality worth the price This step drill bit isn’t just another tool — it’s one of those buy-it-once, use-it-forever kind of products. Perfect for pros and DIYers alike who want precision and long-lasting performance.

### ⭐⭐⭐⭐⭐ Tuff job done with ease
*by K***R on April 17, 2026*

high quality tool for drilling hole in steel sink to install DIY under sink water filter.

### ⭐⭐⭐⭐⭐ Superb product
*by J***S on December 1, 2024*

Here is what I did. Needed to make a extra hole for my sink sprayer, since the original is being used for a filtered water spicket. With a marker I put a dot exactly where I needed the hole, had some extra caulking in the garage so I made a circle around the spot too hold a little bit of motor oil in the spot needed, make the circle bigger around. Set drill on high speed and once the pilot tip goes through, give it short 2 second bursts until you get your size hole. Making the hole took maybe 30 seconds, prep work took less than 10 minutes. This bit cut through it like butter. Superb design and quality.

## Frequently Bought Together

- Klein Tools KTSB15 Step Drill Bit #15 Double Fluted 7/8 to 1-3/8-Inch with Easy-to-Read Step Markings and Targets, 3/8-Inch Hex Shank
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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-10-31*