jiuwu 7pcs Cross Concrete Hammer Drill SDS Plus Rotary Carbide Tipped Four-Blade Drill Bits Set for Stone Cement Wall Brick Masonry Cross Drill Hole Opener

* Note: In the process of punching hole, Suggested that adding water cooling to help to extend the service life of the product. * Superior carbide bit heads ensure outstanding durability and long life under heavy loads * SDS-Plus Drill Bit Set shows the outstanding precisely performance on reinforced concrete, rebar, brick and other hard stone materials. * SDS masonry drill bits / roto hammer bits are fitted with a carbide centric conical tip resulting in smooth accurate holes. * Our four-blade drill is an upgraded version, which has a wider bearing capacity, more wear resistance and durability than traditional two-blade drills. * SDS-Plus Shank has good design groove for the best chucking during applications without sliding. Fit most SDS Plus or light hammer. * Remember to fixed it when drilling. It cannot be moved and must be at a right angle of 90 degrees to the hole. When positioning the drill bit, please wait for a while, and then slowly drill the hole. * Package include: 10x350mm(3/8 X 14-inch) SDS Plus Drill Bits 12x350mm(1/2 X 14-inch) SDS Plus Drill Bits 14x350mm(9/16 X 14-inch) SDS Plus Drill Bits 16x350mm(5/8 X 14-inch) SDS Plus Drill Bits 18x350mm(23/32 X 14-inch) SDS Plus Drill Bits 20x350mm(25/32 X 14-inch) SDS Plus Drill Bits 22x350mm(7/8 X 14-inch) SDS Plus Drill Bits

• The most use of high-quality 40Cr carbon steel, the drill bit used industrial grade hard alloy material, combined with the quenching process, sharp and durable, Long life, good wear resistance, higher impact resistance.
• SDS hammer drill bit features a double u-fluted design can high-speed drilling, cleans debris out fast for easier, low resistance and low drilling wear, work time longer.
• With their carbide composition and ultra-tough tips, these drill bits are able to chip away in masonry applications; brick, stone, concrete, block, stucco, etc. Concrete drill bits set is fully compatible with All SDS-Plus Rotary Hammer Drill.
• The shank has two types of grooves (TOTAL OF FOUR). The smaller grooves fix bit in the chuck. The larger grooves allow bits slipping in the chuck when working, enhancing the drilling torque and hammering energy.
• Carbide Tip 7-PIECE DRILL BITS - Set includes: 3/8 X 14-inch, 1/2 X 14-inch, 9/16 X 14-inch, 5/8 X 14-inch, 23/32 X 14-inch, 25/32 X 14-inch, 7/8 X 14-inch.