We have Milwaukee 4079 Diamond Coring Motor 300/600 RPM, 20 Amp with Shear Pin with Product Detail Two speeds: 300 and 600 rpm, 20 amp motor, Shear pin protection protects gears and motor, Built-in water swivel Built-In Water Swivel, Water Hose Adapter Shear pin protection protects gears and motor Built-in water swivel Limited warranty, 30-day no-risk trial . The "Milwaukee 4079 Diamond Coring Motor 300/600 RPM, 20 Amp with Shear Pin" is best product for you. We recommended Milwaukee 4079 Diamond Coring Motor 300/600 RPM, 20 Amp with Shear Pin