This 23-piece drift set is used to install 10mm and larger inside diameter sealed bearings Compatible with the Wheels Mfg. PRESS-1 or PRESS-4 handles Contains the following Open Bore Drift sizes: (2) 6802 Open Bore (2) 6901 Open Bore (2) 6902 Open Bore (2) 6903 Open Bore (2) 6000 Open Bore (2) 6001 Open Bore Contains the following Over Axle Drift sizes: (1) 6802 Over Axle (1) 6901 Over Axle, 40mm (1) 6902 Over Axle, 7mm (1) 6903 Over Axle (1) 6000 Over Axle, 6mm (1) 6001 Over Axle, 7mm Contains the following speed spacers: (1) 15-25mm Speed Spacer (1) 17-25mm Speed Spacer (1) 20-25mm Speed Spacer (2) 30mm Speed Spacer