Designed for stone setting and engraving Ideal for closing bezels and heavy prongs Allows you to set stones and create decorative textures 2,500 strokes per minute maximum speed 2 year guarantee exclusive to Cooksongold Foredom Hammer Action Hand Piece (H.MH-110) is designed for stone setting and engraving applications. The hand piece has a reciprocating hammer action, ideal for closing bezels and heavy prongs. You can also set stones in channels and create decorative textures on metals. This Hammer Hand Piece connects directly into Foredoms Micromotor Control Box and can reach a top speed of up to 2,500 strokes per minute which can be controlled by either a foot pedal or the manual dial on the control box.