5Pcs Step Drill Bit & 5Pcs Countersink Drill Bit Set, Titanium Coated, 50 Sizes of Step Bit for Metal with Aluminum Case

Ultimate Drill Bits Set- This unit step drill bit includes 5 step bits in sizes 3/16-1/2'', 1/8-1/2'', 1/4-3/4'', 3/16-7/8'', 1/4-1-3/8'', effectively replacing 50 sizes of conventional drill bits. Along with a center punch. Additionally, the counter sinker drill bit set in sizes 1/4'', 3/8'', 1/2'', 5/8'', 3/4''.
Premium Quality Drill Bit Set - Our countersink and step drill bit set is made from high speed steel for longer cutting edge life even at extreme temperatures.step drill set with a titanium coating significantly improves durability and sharpness for less friction and cooler operation,performs well in heat, corrosion and rust resistance.
Premium Design - Counter sinker drill bit set very suitable for sinking 90 degree holes in wood and soft metal countersunk screws and fasteners. Step drill with 118 ° split tip and double groove design, increases cutting speed with self-centering and prevents walking