The Milwaukee 14-09-0111 Cordless Saw Crankshaft Assembly is a replacement component designed for compatible Milwaukee cordless saws. It helps support the saw's internal drive mechanism and proper movement of the cutting assembly during operation. Replacing a damaged or worn crankshaft assembly can help maintain your saw's condition and support reliable performance. https://www.wholetoolbox.com/milwaukee-14-09-0111-cordless-saw-crankshaft-assembly/14-09-0111.html