Add to Cart Quick view DRILL BIT WADFOW 3/16" X 3 3/8" UWMJ2K02 CONCRETE SOLD EACH WADFOW MSRP: Now: $0.63 Was: Concrete Drill Bits. High Quality TCT Tip. Cylindrical Shank. Sandblasted Surface. Concrete Drill Bit.-High quality TCT tip.-Cylindrical shank.-Sandblasted surface.-Packed in blister card.