Drill Chuck Key - Jacobs Model No.: K3, Pilot Size: 5/16"

I like how heavy duty it is. It feels better in my hand than the 4 way key that I used to have before it broke.

This chuck key was hard to find, but I am really happy with this purchase.

After going through several foreign made keys that broke and stripped the teeth, I purchased this key.It fits perfect into the chuck and works great.

Quality replacement chuck key. My old one fell apart. This one is built to last.

Fit perfect. Works great. Reasonable price. Shipping was a little slow.

Quality is nice, feel is great, fit is great , a little bit expensive but I wanted the best and I got it.

I have purchased 6 different Chuck Keys because every salesman alive knows what you need,but have no answer when they get you the wrong stuff. This was right the first time, fits perfect, is well built and doesn’t hurt your hand with burrs or cheap materials. Highly recommend if you need a good quality, correct fitting Chuck Key.

The one delivered has been manufactured by pressing hot metal into a die. The one in the ad was clearly machined. Disappointing. Made in China. Fit to the chuck is sloppier than ideal, but works. My chuck is a new ball bearing Cushman. Package said Jacobs but there was no marking on the key.