The Foredom's hammer handpiece, the model h.15 handpiece, has hammering rather than rotary action for jewelers at low speed (0-100 rpm) for stone setting and decorative work.
This handpiece is a member of the Foredom system of "interchangeable handpieces" will work with any of the flex shaft units that have a key slot connector.
Hammer has 1/32" stroke and its impact can be adjusted from light to heavy by turning the silver knurled adjustment ring.