Bosch HTC187 1-7/8-Inch 50mm TCHS Hole Saw 1-7/8-Inch 50mm Perfect for: Acrylic glass and polycarbonate; cementboard; lightweight concrete; masonry; vertically perforated brick; and roofing tiles. Also use on: Natural wood; hardwood; plywood; woodcore plywood; chipboard-raw, veneered and laminated; fiber-reinforced composites; sandwich materials; plastics. Quick change No Adapter Needed; On tool.