SYOSI 5 Pieces Countersink Drill Bit Set, 1/4'' Hex Shank Carbide 5 Flute 82 Degree 1/4'' 3/8'' 1/2'' 5/8'' 3/4'' Quick Change Drill Bit, M35 Cobalt Countersunk Bits with Bit Holder for Metal Wood Plastic

M35 HSS Cobalt Layered Drill Bits It is excellent prolong life, achieve smoother drilling

Surface Burgundy oxide treatment and a five-flute design removes chips faster and dills smoother and ensures an extended life.

These countersink drill bits work hard the profound processing, achieve exact countersink holes and allows the screw heads to be flush and even with the surface of the material being utilized.

• 【M35 HSS Cobalt Layered Drill Bits】M35 cobalt coated, each metal countersunk drill bit is made from high quality M35 HSS material, countersink drill bit set is excellent in heat, corrosion and rust resistance.
• 【Five-blade design with 1/4" Hex Shank 】Each countersink drill is well designed in five-blade， which can reduce vibration and prolong life, achieve smoother drilling.Permanently attached 1/4" shank. Suitable for all types of drill bits
• 【Product Size】Ideal counter sink tool for the tool box, including 5 most popular sizes: 1/4'', 3/8'', 1/2'', 5/8'', 3/4'' counter sink drill bits. Including one Bit Holder and Storage Toolbox.
• 【82° Design】All drill bits have a 82 Degree angle on the point for sharp and precise countersinking. The cutting edge is hardened and honed for sharpness.
• 【Widely Application】It is used for most medium hardness stainless steel, metals, plywood, softwood, hardwood, fiberglass plastic,mild steel copper, aluminum. These countersink drill bits work hard the profound processing