The 1011 Micromotor is ideal for stone setting applications, including channel setting and engraving techniques requiring reciprocating action. 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- 5,000 strokes per minute with the manual dial on the control box. or the optional foot speed control. 1011 Stone Setting/Engraving Micro Motor Kit includes the MH-011 Hammer Handpiece.