Heat Treated Steel, Open clamps by turning handle clockwise to snug against the bearing for pulling out evenly without damage the parts* Connect with 1/2inch 3/4inch male thread water faucet. Ideal for Automotive flywheel, Motorcycle wheel, Bicycle wheel, Pump bearing generator bearing, Machine bearing etc. Easy to install. High quality and long service life. Specified Bearing Inner Diameter Range: 9mm - 23mm ( 5 open clamps ) For Use In Removing Sleeve Type Bearings From Diameter 0.36inch to 0.9inch (9mm-23mm) Size: 9mm, 11mm, 14mm, 19mm, 23mm Colour:Black Material:Metal Package Contents: 1 set x Auto Motocycle Inner Bearing Puller Tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.