The Smallest, Lowest profile head in the industry! The quick disk on the drive head allows for quick tightening or loosening o f fasteners when ratcheting is not required.Reversible 72 tooth gear head requires only 2 degrees of sweep Polished Chrome - Heat Treated Alloy Steel. Works with all 1/4"Hex Bits and 10mm fasteners. One end fixed, the other end pivots between 180° Includes 1/4” and 3/8" Square Drive InsertLimited Lifetime warrantyPatented Worldwide