We are the original and the best since 2007. Please check our reviews and see what our customers have to say about our patented chucks.

This Cowan Chuck is a drill chuck designed to fit the square rotor of a 3/8” impact wrench. Now, an impact wrench can be used as a tool to drill materials such as concrete, cement, brick, stucco, stone, wood, etc., with this impact wrench half inch drill chuck. An impact wrench makes a great hammer drill. This new impact wrench hammer drill utilizes the downward rotary hammer movement to drill more efficiently. The hammer action only starts when needed, providing a nice clean hole.

The Cowan Chuck, made tempered tool steel, is a durable impact wrench accessory for your 3/8” impact wrench. The pneumatic impact wrench and 1/2 inch drill chuck combination stays cool on the job. It's air-cooled. Impact wrench accessories can be expensive. You won’t get this impact wrench accessory at a better price, and you won’t find this impact wrench drill chuck anywhere other than from J R COWAN Mfg. Note: This is not your standard 3/8” drill chuck. It is a full 1/2” drill chuck for those larger drills.

This is part of the original Cowan Chuck Family of impact wrench drill chucks. Our chucks were established in 2007 We hold 2 patents on our original designs, D601,875 S and D605,921 S. Our chucks are assembled, welded, and tested right here in the USA, in our facility. Furthermore, we ship them to you FAST by US PRIORITY MAIL. That's 2-3 day delivery, USA. Check our reviews, and see what our customers have to say about our patented chucks. We have held a 100% rating for years. Buy now, and get going on your project! 

We have done strenuous tests on these chucks to provide you with the best on the market. Our chucks can be used forward or in reverse for fast drill bit release. Cowan Chucks are guaranteed. This chuck design has been tested up to 350 ft.-lbs. of impact wrench force for 2 minutes. The test was done with a 1 inch spade bit locked in a vice. The test was performed forward and reverse.

BEWARE OF THESE CHEAP ADAPTERS FOR DRILL CHUCKS FLOODING THE MARKET. THE SCREW BREAKS AS SOON AS YOU TRY TO USE THEM IN REVERSE. For instance, you drill deep into a piece of wood, and your bit gets stuck. Now you put it into reverse, to back it out, in an attempt to loosen the bit. The internal screw will fracture then break. the 2 piece chuck will come apart. Your drill bit and chuck are jammed in the hole. How are you going to free it? They conveniently don’t tell you that.

Remember the old saying, “You get what you pay for”?


OUR CUSTOMERS ARE 100% SATISFIED.

NEW - SET SCREW TO HOLD CHUCK FIRMLY ON IMPACT WRENCH.

Why buy another chuck? These chucks connect and disconnect quickly. Put your starter drill in one chuck and the larger drill in another. It’s faster and easier to just change chucks.

See our selection. Visit our store. Please click on the link below.

IMPACT WRENCH ACCESSORY

Please note: We ship US Priority Mail, not UPS. When purchasing, please give your mailing address, thank you.