About This

【Specification】11pcs/set. This kit contains 8pcs diamond core drill bits; 1pc 4/5" diamond finger bit; 1pc 2" diamond chamfer bit; 1pc connect 5/8"-11 thread to SDS adapter.
【Application】EXFEIN core drill bits are used to drilling holes; The chamfer bit is not for drilling, but for quickly enlarging or trimming holes; When the chamfer is reamed or edging, the ground edge is beveled. It may be necessary to continue to correct with a finger bit. The finger bit is not for drilling, but for finely enlarging holes or grinding; Dry or wet use. If you want to be dust-free, please use them with water. For porcelain tiles, marble, granite, etc.
【Machine】5/8" arbor angle grinder. Recommended speed 6000RPM; Maximum speed 11000RPM. sds adapter in this kit can be attached to a drill bit with a 5/8" fitting so that the drill bit can be attached to your drill machine with sds-plus thread. If you are using this kit on a hand drill, make sure that the drilling speed does not go below 2000 RPM. and do not use the impact drill mode.
【Durability】Vacuum Brazed technology combines a high-quality steel matrix with diamonds in a scientific ratio and provides high efficient working performance and longer service life.
【Fast drilling】Lightning teeth has wide chip removal slots, dust can be quickly discharged when drilling, not easy to be clogged.