This is an inexpensive engraving and bright cutting system. Flexible vinyl tubing allows unrestricted hand motion for applications which include engraving, bright cutting, texturing, bezel setting, hammer setting and much more. Hammer action of this diamond tipped tool adds a luxurious texture and sparkle to gold and silver jewelry. Air driven hammer handpiece is powered by a compressor and the speed control knob changes length of stroke and depth of mark. Pencil type grip and a replaceable hammering diamond point ( Item # DTS-1109 ).