BGTEC Dry Diamond Core Drill Bits Set Hole Saw,10pcs 3/16"*2+1/4"*3+5/16"*2+3/8"+1/2" Hex Shank Drill Bits+1/4" Triangle Shank Carbide Drill for

BGTEC Dry Diamond Core Drill Bits Set Hole Saw,10pcs 3/16"*2+1/4"*3+5/16"*2+3/8"+1/2" Hex Shank Drill Bits+1/4" Triangle Shank Carbide Drill for

【Heat dissipation】The total length of the drill bit is 65MM, and the 6-14MM drill bit is equipped with a spiral groove, which helps to quickly dissipate heat and chips, and effectively improve the drilling efficiency. 【Excellent Finish】Diamond is dense and delicate, less debris when drilling, with smooth and perfect drilling effect. 【Contains cooling wax】 By using cooling wax,can be drilled directly dry without adding water, which extends the service life and at the same time allows you to work more comfortably and quickly. 【Precise positioning】Each set comes with a 6mm carbide drill bit to help you position the hole precisely before drilling to avoid drill bit slippage and inaccurate drilling. 【Highly advanced technology】By adopting high-end vacuum brazing technology, the diamond and the substrate bond closely and the service life is long and reliable, which is the ideal choice for your drilling work.