4 Size Adjustable Brake Piston Cylinder Hone Tool 3 jaws stone Range:19-63mm 32-88mm 51-177mm. 1-1/8" 3 Stone Adjustable Brake Piston Cylinder Hone Tool Range:3/4" ~2-1/2"(19~63.5mm). 3 Leg Stone Adjustable Brake Piston Cylinder Hone Tool Range:1-1/4"~3-1/2"(32~88mm).