INTERLOCKING CASEFeatures a clear lid for easy identification, easy bit removal, and compatibility with other SKIL accessory cases for custom configurations CARBIDE-TIPPEDTwo distinctive carbide-tipped cutting edges allow the bit to drill faster, more efficiently, and stay sharper longer DUAL FLUTESAllow for removal of debris and particulate that can slow and bog down bits when cutting through brick and cinder blocks HEX BITOptimized for use with hammer drills and impact drivers, 1/4-inch hex shank provides superior contact for limited slipping IMPACT BITStrong shank and body allow the bit to withstand the abuse of drilling through hard materials like block and cement when used as an impact bit SPLIT POINT TIPOptimized for speed and precision, the split point tip guides the bit into masonry material upon contact HEAT-TREATEDHardened for bit strength and designed to stay sharp longer CLEAR LABELINGBold print for easy bit identification, no straining to read a hairline imp