From Foredom, the HPMH-001 reciprocating handpiece has a slender, contoured grip and impact adjusting ring for precise hammering work. It operates from 0-2,500 strokes per minute. The force of the impact of this reciprocating handpiece can be adjusted from light to full by turning the metal ring while the motor is off or running. The speed of the hammer action can also be varied from 0-2,500 strokes per minute with the manual dial on the control box, or the optional foot pedal. Used with the Graver Holder, HPMH-011 handpiece becomes a precision power engraver, without the need for an air compressor or a flexible shaft drive.