Cylinder hone for honing out engine cylinders of 51177mm diameter (2" 7"). Suitable for use with variable speed electric or air powered tools with a maximum speed of 2400 RPM. Adjustable honing pressure so you can vary the pressure of the honing block on the cylinder wall to get just the cut you need. Also has adjustable leg spread which enables you to adjust the width of the arc of the legs. The main drive shaft is also flexible which makes for easier alignment. Medium Grit stones 100mm (4") in length. Self adjusting to the cylinder size for easy and quick use.