With up to 3 embedment depths, the UltraCut FBS II US allows for the same screw to be used for different component thicknesses. The special saw tooth geometry enables fast cutting into the concrete. Drill holes do not need to be cleaned during vertical installation (ceiling and floor). For floor fixings, the hole must be drilled 3x drill hole diameter deeper. Weight: 0.0661386786 Pounds, Manufacturer: fischer.