Used to prevent piston ring damage while inserting pistons into the cylinder head. Easily removed when cylinder is in place. Tool supplied with four ring clamps ranging from Ø40-85mm. Will fit most engine sizes. Features & Benefits:Used to prevent piston ring damage while inserting pistons into the cylinder head.Easily removed when cylinder is in place.Tool supplied with four ring clamps ranging from Ø40-85mm.Will fit most engine sizes.Model No. SMC16 Specifications: Model No SMC16 Brand: Sealey Nett Weight: 0.225kg Small Ring Clamp: Ø40-50mm Medium Ring Clamp: Ø50-70mm Large Ring Clamp: Ø60-75mm Extra-Large Ring Clamp: Ø75-85mm