Material: These concrete drill bit set made of Tungsten carbide, harder, tougher, and more resistant. Bit tip with braze and hardening process for long life. SDS Plus Rotary Drill Bits Widely application: Suitable for Masonry, Cement, Ceramic Tile, Brick, Block, Concrete. etc. These drill bits can use with electric or cordless hammer drills for home decoration, walls perforation, wire switch installation. etc. Finish: Optimized brazing and hardening process for long life. The special 1/4" HEX Shoulder for use with standard concrete screw installation sleeves, which eliminate the need for drill adapters Size: 5/32 x 7"，25PCS Tip: slot tip. Shank: SDS Plus shank. Coating: Sand blast. Package: Each peice in a plastic tube. Condition: Brand new and high quality Carbide-tipped bit heads are harder, tougher and more resistant and durable under heavy loads. Optimized flute design to reduce bit stress and make the bit run cooler. Optimized braze and hardening process for long life. Centric tip for optimal hole geometry and provides rounder holes. Bits will fit certain Bosch, Hilti, Milwaukee, Makita, Dewalt, and Porter Cable drills. Sds Plus hammer drill bit set is great for use in Quality rotary hammer percussion drill that uses the SDS PLUS drive system. These bits are specifically made to work on a handful of makes & models so be sure your drill says SDS PLUS!!