Low speed: about 200 rpm/RPM Materials that can be tapped: iron materials, steel materials Tapping materials: aluminum alloy, galvanized steel High speed: about 550 rpm/RPM Materials that can be tapped: plastic, wood Tapping materials: rubber, aluminum ducts Craftsmanship quality: imported bearings, double self-locking Product features: Fast and precise tapping, easily imve work efficiency, industrial grade choice. Tapping specifications: M3/M4/M 5 /M6/M8/10/M12