3PCS big Bolts don't line up with holes of 36t sprocket,unscrew the 2pcs small bolts to 1 inch adapter, it will line up. this is is unique and special design ,not wrong drill
Adapter fits 1 inch rear hub of SPOKE WHEEL BIKE with a diameter of 1"to 1.02" (FOR SPOKE WHEEL BIKE ONLY) Used with 12G and 14G spokes
The Adapter ensures concentricity with the wheel hub by using the unique two piece adapter that wraps around the rear wheel hub and enables you to drive the entire wheel instead of applying pressure on the spokes