5/16 x 12-In. Percussion Masonry Drill Bit Air & Water Pressure Drain Openers The fully insulated probe tip

The fully insulated probe tip eliminates the risk of contacting live electrical wires while the patented battery check feature designed into the unit ensures tester and batteries are operating properly

Adjustable stop collar attaches to counterbore for controlling countersink depth

and a tough all-weather shell

Ideal for use in malls

Sealing & As A Filler For Most Materials

5/16 x 12-In. Percussion Masonry Drill Bit Air & Water Pressure Drain Openers The fully insulated probe tip5 16" x 12" Percussion Bit, Improved Carbide Tip Provides Up To 2 Times Longer Life, Innovative Tip Configuration Reduces Walking For Improved Accuracy & Unique Flute Design Efficiently Removes Dust Reducing Bit Binding, For Concrete & Masonry Drilling.