Change the impact characteristics of GRS handpieces just by mounting a tool or graver in these Soft-Hit QC Tool Holders. These give a softer impact because the back end of the tool holder is made with a special plastic tip. This creates a smoother, softer energy transfer from the handpiece piston to the tool. Fine engraving and shading are easier to control, tool stress is reduced, and hand vibration is decreased with Soft-Hit holders. The difference is subtle, but well worth a try for fine work. The Soft-Hit works only in GRS Monarch, 901, Magnum, or System 3 handpieces.