FIRSTINFO 3 Arm Bearing Puller Kit Bearings Working Range with 1/2"~1-1/2" (12~38mm) inside diameter Operation video https://youtu.be/1YLeGvYr53s Capacity Range: 12mm~38mm ; Removes all sleeve-type bearings with 1/2"~1-1/2" (12~38mm) inside diameter. Structure design, gently turning the small wrench can produce a strong pull force. The overall use of chromium vanadium just manufacturing, high hardness. Ideal for pilot bearings, pump bearings, brushings, automotive flywheel, motorcycle wheel, bicycle wheel, generate bearing, machine bearing etc.