Type 41 cutting disk is bonded by resinoid and used for severing. The net reinforcement is for the circumference structure, therefore only the circumference is in contact with the work piece during use. Do not exceed maximum speed nor use the flat annular face as this will result in breakage and possible danger from the flying debris. Can't use for grinding at the face. To use with SOUTH HOUSTON, Model : SHC7520-F CUTTING DISK Type : 41 Dimension : 76 X 1.8t X 10mm Abrasive : Aluminum Oxide Maximum Speed : 23,000RPM Grit : A46