Lightweight and comfortable, the Pro-Electric Bead Reamer makes smoothing and enlarging bead holes quick and easy to do. Use the small and larger pointed reamers for enlarging holes and use the cone-shaped 45 degree edger to smooth the edges of holes. The variable speed gives you lots of control over your work - from 1,000 to 20,000 rpm. Set Includes: One Bead Reamer 3 Diamond Coated Tips: Small, Large and 45 degree edger 2 replacement chucks One AC adapter Always wear safety glasses. Intended for adult use only.