Spyder 19025 1/8-1/2 & 3/16-7/8 Step Bit Set

Proprietary Mach-Blue Armor Plating is a super hard surface plating that retains sharper cutting edges, and reduces heat build-up and cutting friction œ resulting in faster cuts and exceptionally long drill life. Impact rated 1/4³ speed hex won't slip in conventional 3-jaw chucks andideal for use in quick change impacting power tools. Optimized 135° self-centering split point cutting geometry won't walk or wander œ even on pre-hardened or curved surfaces. Advanced M-Series alloy tool steel construction and proprietary heat treatment increase drill bit durability, rigidity and breakage resistance. Ideal for drilling stainless steel, mild steel, aluminum, stackedsheet materials and other tough-to-drill alloys.