The bit rotates twice with each depression of the handle, reducing effort. The integral ratchet lets you give a final snug during installation or apply controlled force to begin backing out a stubborn screw. The slim profile lets you work close to an adjacent surface. The long shaft provides extended reach, and a collar at the top of the barrel locks the spiral down for use as a regular driver or for compact storage.
The 11-1/2" driver is supplied with three 5.5mm shank bits: a #2 Phillips, a 7/32" slotted and an 11/64" slotted. The 17-1/2" driver comes with three 7mm shank bits: a #2 Phillips, a 7/32" slotted and a 1/4" slotted.
Both are made of chrome-plated steel and have wooden handles.