It will not damage piston during operation.
Tool includes knurled aluminum handle, 9/16 hex lead screw and three left-handed adapter nuts.
Applications:
Piston sizes: 40mm (1-5/8”) to 100mm (4”)
Piston pin sizes: 12mm (1/2”) to 25mm (1”)
Including all single-cylinder engines from 50cc to 600 cc and all 2, 3, & 4-cylinder models.