U- Shaped Knife Groove Facilitates your drilling process and makes it easy for you to clear debris while drilling. Reduce the life consumption of the drill bit. Non-Slip Triangle Handle The drill bit shank is cut into a body triangle to make the electric drill clamping more tight and the drilling does not slip. Precise Penetration The precise and unique parallel angle design of the auger bit reduces sliding and walking. Making your masonry drill bit goes into concrete as smooth as butter. Package Included: 1pcs * 1/8" drill diameter 1pcs * 5/32" drill diameter 2pcs * 3/16" drill diameter 4pcs * 1/4" drill diameter 2pcs * 5/16" drill diameter 1pcs * 3/8" drill diameter 1pcs * 1/2" drill diameter That will help in drilling by starting with smallest bit and continuing to size needed. WIDELY USED: Drilling through brick, mortar, and concrete is a breeze with this drilling set. Making it ideal for drilling fastener holes in bathroom tiles, ceramic drill bits for pots, or wall mirrors, and more. It can easily drill holes on tile, concrete, brick, glass, ceramic, wood while reducing breakout. User Instruction: 1. It's recommended to use water to avoid damaging the drilling head. Please turn off the hammer mode, to avoid bit damage. 2. The drilling head is durable and can resist high temperature up to 1000°C, but long sessions of work over 1000°C may cause the head to burn. 3. It's not recommended to use these drill bits with lithium drills lower than 24V. When drilling, please be careful and change position when there is reinforced concrete ahead to avoid damaging the drilling edge.