Drapers adjustable hole cutter can be used with most variable speed rotary or stationary pillar drills thanks to the sturdy construction with transparent cowl to retain flying debris whilst drilling especially useful when drilling ceilings etc supplied with pilot drill and hexagon key for easy radius adjustmentthis hole cutter can be used to cut plywood plasterboard acrylic sheet up to 23mm depth 45mm if drilled from both sides aluminium brass and sheet metal up to