7-Piece Drill Bit SetThe 7-Piece Sds Concrete Drill Bit Set With 4 Cutting Edges And Carbide Plate Is Suitable For Any Sds Plus Hammer Drill. 5, 6, 6, 8, 8, 10 And 12Mm. The Drill Set Is Placed In The Storage Box, Written In Storage And Transportation. High-Quality Materials The Drill Bit Body Is Made Of 40Cr Alloy Structural Steel, And The Tip Is Made Of Yg8C Hard Alloy. Wear-Resistant Tool Head Design, Brazing Process To Ensure That The Drill Bit Is Solid, The Alloy Is Not Easy To Fall Off. Quick Dust Removal The Optimized 4-Tooth Design For Smooth And Efficient Drilling On Concrete, Brick, Block, Stone, Masonry And Granite. The Double Flute Can Clean Debris Quickly, Reduce Bit Tension And Increase Bit Life. Scope Of ApplicationApplies To Concrete, Brick Wall Operation . Suitable For All Hammers With Sds-Plus Four-Hole Clamping System. Customer SatisfactionCustomer Satisfaction Is Very Important To Us, So We Want To Make Your Purchasing Decision As Easy As Possible. We Take The Risk And Promise: If You Are Not Satisfied With The Purchased Product Or If The Drill Breaks, Please Contact Us And You Will Receive A Free Replacement Product Or A Refund - Within One Year From The Date Of Purchase. Date Of Purchase.