WITH RUBBER TIPS ------ The rubber tips provide protection to avoid scratching your key fob hardware. With plastic tip covers on the jaws, the covers protect the glass from getting scratched or chipped from the tool itself Comfortable Premium Grips and the Rubber Tips to Help Secure Glass, Curved Jaws apply leverage to run the score reducing hand fatigue. HIGH QUALITY ------ Adjustable set screw allows you to control the amount of pressure applied, set screw is easy to adjust, and properly tapped; you can use them on different thicknesses of glass. GREAT VALUE ------- Great tools is not only for glass fusing, breaking small pieces of glass for crafts, cutting glass for window panes and for most glass projects. But aslo Install Key Fob Hardwar easily. WORKING WELL ------- The tool install Glass working well, Running Plier Jaws act as a fulcrum where pressure is applied evenly on both sides of a score line, running the score through the glass. Runnering pliers work best on straight cuts, do well on gentle curves too.