The Endurer is the only double sleeve keyless chuck to withstand both impact driver and impact wrench action. And it's easy to use!

1.  Insert the drill bit and center it in the jaws by      holding the rear sleeve while tightening the front      sleeve by hand.

2.  To fully tighten the drill bit chuck, firmly hold the      front sleeve while switching on the impact      driver/wrench in clockwise direction.

3.  To release the drill bit, firmly hold the front sleeve      while switching on the impact driver/wrench in      reverse direction.