1/4 Inch Hex Shank Keyless Drill Chuck Quick Change Adapter Converter drill adapter (0.3-6.5mm 0.3-3.6mm)

I recently purchased a new screwdriver gun from Harbor Freight and I really like it. I saw they also have drills but I got the idea to shop for an adapter. I saw one at Home Depot and it was about 26 dollars, or about 2X the price of this one, and only had one size. For most drilling projects you really don't need to use very large drill bit so I purchased this through Amazon and was pleasantly surprised. PRO's: It holds onto the drill bits just fine and my screwdriver has a light to illuminate what I am working on. My older drill doesn't. Quick release! If you want to drill something, then quickly screw something but you don't want to lug both a drill AND screwdriver around, this is a great solution. Additionally, if you need two, different drill bits you can load both of these and put one in your pocket. Using the quick-release function most screwdrivers have you can swap out bits FAST and then a screw-head if needed. So using this in a screwdriver to drive pilot holes is IDEAL! Durability? So far it has been very durable and seems to be very well made, indeed. Now for the cons: As far as I can tell there are no drawbacks to using this at all. I keep it in my tool belt at all times along with a few drill bits because I have found they really do come in handy around the house.

Exelente producto gracias

I purchased these to allow me to grab a circular-shaft mixing paddle in a power-screwdriver handle. I used the larger chuck to hold a 1/4 inch diameter shaft. It worked fine for my task, but it surprised me when I reversed the screwdriver drive and everything came apart. I guess I'm used to my power drill that uses a Jacobs-type chuck that can be driven under load in either direction. If you drive this chuck in the reverse direction, the chuck loosens up the grasped shaft just falls out. It's only functional for rotation in the forward (right hand rule) direction. That's a serious limitation for many applications and should be more clearly described in the Amazon write-up.

Good chucks that can be used with an impact driver. Seem to work well.

It's 2 bits, one small, one slightly larger tbh. When used with a quick-release drill, you end up with a pretty sweet chuck to use with your specialty drill bits. This makes all that switching between two types of drills a thing of the past. With 2 bits, you really unlock the flexibility. My only gripe is the almost an inch of space between the chuck and the end of the shaft. This make for a flimsier and shakier experience with wider bits like spades and buffer attachments. Its noticeable enough to drop the rating 2 stars, so you be the judge on that.

these are drill chucks, which rely on smooth rotation of the outer barrel to grip a drill. Both items are very roughly manufactured, and the outer barrels barely work - they barely turn, making their use difficult. Sometimes they JAM when one tries to turn the outer barrel to grip a drill bit, and a wrench is needed to free it up. LOOKS GOOD BUT MECHANICALLY THEY ARE TOTAL JUNK.

Have not used the product, yet. As far as looks and coating and operation, it is quite perfect and meets expectations. I'll use it shortly, and update this review if all goes south. For now, some of the other reviewers were mistaken... the units do not fall apart if you unscrew the shaft all the way out... just don't throw it across the room of drop it in some oily mess... and, why would you want to do those silly things anyway? Just use CS (common sense), don't close your eyes, and pretend you are an adult... you'll be just fine. Oh, and don't hammer the end or use a pipe wrench on it (remember what I said about CS?). It is meant to hold a drill bit with a round or hex shaft. You'll probably use it in one of those quick-change chucks on a regular or impact drill. Buy something else if you want to swim with it or use it for a sinker when fishing. or hold a pencil... there are other accessories for those activities. But, to hold a drill bit... this just might work for you!

The precision of these chucks is extremely fine when the 3 jaws meet they are completely closed. Therefore aliening a drill bit is going to take precision, a good eye and finger technique to synchronize the 3 jaws to meet the drill bit centrally. Each Keyless Drill Chuck jaw tip should be equal to one another resting on the side of the drill bit. If this is accomplished you will have the best possible chance of being true. Once you begin drilling the bit holds true. The pictures show a ½ inch drill chuck and the LONKER Keyless Drill Chuck side by side with a drill bit in the LONKER Drill Chuck size 0.0188 inches or 0.478mm See the ½ inch drill chuck closed the ½ inch chuck can support the smallest drill bit of only 0.078 inch 1.98mm The penny has a start drill hole using the 0.478 mm drill bit see at the hair line of Lincoln’s head. The ½ inch drill would not be able to do this without the help of LONKER Keyless Drill Chuck. LONKER Keyless Drill Chuck can fit smaller diameter drill bits than stated in the product description. I used the smaller LONKER Keyless Drill Chuck on my Rotary Tool with speed adjustable dial (0 to 30,000 RPM). See Pictures!