Combination Drill Bit Designed to drill through wood and masonry walls for installing computer, security, phone, and cable small wire systems DBC-3818 Combination Bellhanger Drill Bit, Wood & Masonry, 3/8" x 18" DBC-3824 Combination Bellhanger Drill Bit, Wood & Masonry, 3/8" x 24" DBC-1218 Combination Bellhanger Drill Bit, Wood & Masonry, 1/2" x 18" DBC-1224 Combination Bellhanger Drill Bit, Wood & Masonry, 1/2" x 24" DBC-144 Combination Drill Bit, Wood & Masonry, 1/4" x 4"
