Eliminate the chance of your drill bit popping through the drywall! This Rack-a-Tiers Bumper Ball set keeps your drill bits centered and stops them from "bit walking." Rack-A-Tiers Bumper Ball Set helps guide your flexible in-wall drills to their correct location without having them go off course.

This set includes two different sizes that fit most 3/16" shaft drill bits. The two included ball diameters are 1-1/2" and 2".