We have Milwaukee 4094 Diamond Coring Motor 450/900 RPM, 20 Amp with Shear Pin with Product Detail Two speeds: 450 and 900 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 4094 Diamond Coring Motor 450/900 RPM, 20 Amp with Shear Pin" is best product for you. We recommended Milwaukee 4094 Diamond Coring Motor 450/900 RPM, 20 Amp with Shear Pin