Adjustable stop-collar permits quick selection of two range settings, from 2" to 4" and from 4" to 7", and serves as safety stop if tool is extracted from cylinder while turning

Three stones provide more cutting surface and assures quick removal of cylinder glaze

Full 2" to 7" range (50.8 - 177.8 mm) Controlled pressure assures positive, adjustable contact through full range

Operates with any electric drill

Easily compressed with one hand to eliminate vertical scratches which might spoil the diamond cross-hatch pattern when removing tool from cylinder

Furnished with 180 grit stones