The HART 5-Piece 1-1/2 Reinforced Cut-off Wheels Rotary Accessory for Metal and Plastic are perfect for any DIYer or Hobbyist. With a max RPM of 35 000 these wheels can quickly and easily cut through both metal and plastic. Reinforced wheels are bonded by a mesh center which extends the life of the wheel. They are also compatible with most rotary tools making them a versatile and essential addition to any accessory kit. This set includes (5) 1-1/2 Reinforced Cut-off Wheels.