TOP QUALITY RUMBER MILL BASE SHOCK ABSORBERS, THIS KIT INCLUDES (4) RUBBER BUMBERS AND (4) SELF TAPPING SCREWS. A 9/64 DRILL BIT IS REQUIRED TO DRILL (4) PILOT HOLES FOR THESE SCREWS. ALOT OF OLDER MIL-RITE MILLS DON'T HAVE THE RUMBER BUMPER FEET AND THEY TEND TO MOVE OR VIBRATE ON COUNTER TOPS.