》》《》 Metal cutter with sintered carbide 32mm TLS75932 《《》. SPECIFICATION: Max RPM when drilling steel max.380 rpm. Copper zinc, nickel brass = max.480 rpm. rpm. Aluminum = max.580 rpm. We recommend drilling with oil The hole saw is also applicable to wood. RPM = minimum 1000/min.KIT:️ hole saw️ guide drill bits️ allen wrenches to hold drill bit.