SUTTON TOOLS HD-COBALT Jobber Drill Bits are industrial quality for drilling materials that have high hardness and tensile strength such as cast iron, bronze, hardened steel & stainless steel. These drill bits feature a thick core for increased rigidity in hard materials.
Features

135 Split Point (>2mm & >3/32″) – Enables accurate positioning and less drilling pressure
Thick core – For increased rigidity in hard materials
Precision Engineered Parallel Shank – For accurate hole size
Made from HSS-Co (Cobalt) – The 5% cobalt formula improves abrasive & heat resistance, for increased strength at higher cutting temperatures
Colour Tempered Surface Finish – Enables identification of cobalt tool material

Includes

21 x HD-COBALT Jobber Drill Bits (1/16″ – 3/8″ in 1/64″ increments)
Plastic Index Case