Features: 1. Create an exquisite, bright cut Patterns on precious metals and so on. 2. Finest quality industrial metal material, and robust, with a long operating time. 3. Easy to use with any micromotor or flex Shaft motor with a speed of 2000-5000 rpm / min. 4.Application for engraving material: gold, Silver, copper, aluminum, acrylic. 5. Different angles are available, 120, 125, 130, 135, 150 degrees depend on your choice. Technical data: Condition: brand new Material: metal Length: Approx. 3.5 cm Optional angle: 120 degree, 125 degree, 130 degree, 135 degree, 150 degrees Application: jewelry engraving package List: 1 * flywheel Note：Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.