The Foredom no.15 Handpiece has hammering rather than rotary action for use at low speed (0-5,000 rpm) by jewelers for stone setting and decorative work. Comes with an anvil point (no. 236-477) and requires periodic lubrication. Hammer has 1/32" stroke and its impact can be adjusted from light to heavy by turning the silver knurled adjusting ring. Optional points are available (see related products below). A carbide tipped stylus point is available for marking, scribing, and engraving. Should be used at motor speeds of 1000-5000 RPM.