Masonry Drill Bits Set by. CONCRETE DRILL BIT SET： This masonry drill bit set for concrete drilling, with drill bits being made of high-strength steel for built to last. 7SIZES MASONRY DRILL BIT SET：With 1/8", 5/32", 3/16"( 2), 1/4"( 4), 5/16"( 2), 3/8" and 1/2" 7sizes, this set of drill bits is suitable for various drilling tasks, from small to large.
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