Pre-assembled for easy installation Fits AquaSpec cold-water handles—opens clockwise/closes counterclockwise Short, 2 1/8” stem for faucet handles with an exposed retaining nut (not for Zurn faucets with covered retaining nut) Lead-free cast brass provides durability while complying with the Safe Water Drinking Act Positive shutoff eliminates drips and leakage to save water without over-turning the handles; Square broach allows handles to align perfectly; Interchangeable with other manufacturer's parts; Chicago part no. 1-100XKJKABNF; Limited lifetime warranty