Spyder 1/4 to 3/4-inch Hex Shank 9-Step HSS Drill Bit with Mach-Blue Armor Plating for Steel, Aluminum, Stacked Materials, and More.

Spyder Stinger Mach-Blue Armor Plated high-speed steel (HSS) step drill bits are high-performance metal drilling bits that provide exceptional quality and performance. Their Mach-Blue Armor Plating, advanced M-series alloy tool steel construction, and proprietary heat treatment make these bits truly revolutionary — they retain sharper cutting edges for longer than titanium or black oxide drill bits, and have reduced heat build-up and cutting friction. These incredibly durable bits are the pro’s choice for precision drilling, extended bit life, and value. Ideal for electrical work and other applications in sheet metals, including enlarging existing holes. Made in the USA. 1/4 to 3/4-inch Hex Shank 9-Step HSS Drill Bit. At Spyder, we don’t just make tools—we redefine what’s possible. Built for those who demand the best, our power tool accessories deliver unmatched performance, innovation, and durability.

• Ideal for drilling wood with nails, stainless steel, mild steel, aluminum, stacked materials, and other tough-to-drill alloys
• Durable enough to cut up to 50x more holes than titanium or black oxide drill bits and cuts up to 2x faster
• Proprietary Mach-Blue Armor Plating retains sharp cutting edges, reduces heat build-up, and cuts friction
• Impact-rated ¼-inch speed hex won’t slip in conventional 3-jaw chucks and is ideal for use in quick-change impacting power tools
• Optimized 135° self-centering split point cutting geometry won’t walk or wander – even on pre-hardened or curved surfaces