... control advanced equipment,plenty experience timely delivery ISO9001 MASONRY DRILL BIT -- BLACK AND SILVERThis drill bit is machined from high carbon steel with ... (KG)/CARTON:G.W:16 N.W:158 PCS MASONRY DRILL BIT SET8pcs Masonry Drill Bits Set in Plastic Box with cardSizes: 3,4 ... : 3, 4, 5, 6, 7, 8, 9, 10mm MASONRY DRILL BIT -- MULTI PURPOSEGround carbide tip for precise spot drilling, also reducing ...