GearWrench 2833D 3 Arm Engine Cylinder Hone 8” GearWrench 2833D 3 Arm Engine Cylinder Hone 8” is designed to hone and remove glaze from engine cylindes from 3/4” to 4” and 19mm to 101mm in diameter, includes medium grit stones no. 240, and can be used to adjust spring tension for positive cutting action and set diameter with spread limiter.