Effortlessly create smooth and precise holes with our Spiral Groove Step Drill Bit Set. This set offers versatile drilling options with the ability to drill holes of various sizes without the need to change bits. The titanium coating reduces friction and heat, resulting in smoother and rounder holes. The double-cutting blade design enables faster and smoother cutting, while the tri-flatted shank design ensures durability, hardness, and wear resistance.
FEATURES: 
-Forged from high speed steel (HSS) adds durability 
-Heat treated and highly polished drills make the holes-cutting job easily being varied tools for application of 4-20mm 
-Shank design for preventing slippage
 
SPECIFICATIONS:
-Condition: Brand New
-Material: HSS steel
-Color: Black
-length: Approx. 6.5 cm --4-20mm Approx. 7.5 cm
-Drill cutting specification: 4-20mm Hole Sizes in 2mm Steps (9 steps)