Craftsman tools and tool accessories are available at any Sears Store. The Sears line of quick release bits is called Speed-Lok. They have by far the greatest number of bits, accessories, etc. for the quick release system. Experts have tested their 8 to 27 piece sets. And the advice is that if you want to be the best on your block you should go in for the Master Drill and Driver 85 piece set! Aside from all of the normal bits and such these sets come with two cool drivers. One is a screwdriver bit that has a sleeve that prevents the screw from slipping off the bit. As you drive the screw, the sleeve retracts allowing you to countersink the screw. The Speed-Lok sets also come with a countersink drill bit and driver in one. Once you drill the pilot hole and the countersink hole with one motion, you quickly rotate the bit in the special holder and you are ready to drive the screw. It is a very handy feature. And of course, because they have the Craftsman name, they offer a lifetime warranty.