GREAT TOOL
TURNS MY PORTER CABLE SDS HAMMER-DRILL IN TO A HD 1/2" DRILL. MAKES IT MUCH MORE VERSATIALE

More versatility for your SDS drill
I use this accessory with drill bits for wood/metal and those arrow shaped tile bits in rotation only mode.

You can hammerdrill with this 3 jaw chuck, for example the bits that come with the blue Tapcon screws, but I prefer sds bits with the 5/16" hex shank for drive sleeves, it is faster to use and a much stronger grip on the drill bit.

My 3 jaw sds chuck did not come with a manual but I figured out that if you pull the collar down and to the left you can quickly and quietly adust the jaws, I dont know what that is about but Bosch has put it so there must be a reason.

I turn my Bosch Bulldog into a drill when I play the uncharged cordless battery game. Sometimes its even handy to use alongside the cordless drill driver.

I had to get used to the rubber boot over the jaws, but really you just push the drill bit through the rubber boot and tighten with the chuck key (all 3 holes for a good grip)

I just learned that SDS means slotted drive system.