The Spyder Stinger™ Mach-Blue™ Armor Plated high speed steel (HSS) bits are high performance metal and wood drilling bits that provide exceptional drill bit quality and durability, drilling performance, and value. The Mach-Blue™ armor plating combined with the advanced M-series alloy tool steel construction and proprietary heat treatment make these bits truly revolutionary - they retain sharper cutting edges for longer, have reduced heat build-up and cutting friction, and increased durability, rigidity, and breakage resistance. These incredibly durable bits are the pro's choice for precision drilling, extended bit life, and value. 100x more holes and 8x faster than titanium or black oxide coated drill bits Super hard Mach-Blue™ Armor Plating retains sharper cutting edges, and reduces heat build-up and cutting friction Durable drill bit for long drill life, precision holes, and increased speed and productivity in tough-to-drill applications Impact-rated 1/4-in speed hex won't slip in conventional 3-jaw chucks and is ideal for use in quick change impacting power tools Optimized 137-degree self-centering split point cutting geometry won't walk or wander -- 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 Spyder Mach-Blue™ drill bits are made in the USA and ideal for drilling stainless steel, mild steel, aluminum, wood, stacked materials and other difficult to drill alloys Exclusive to Lowe's Set includes 1/16, 5/64, 3/32, 1/8, 5/32, 3/16, 7/32, 1/4, 5/16, 3/8-in bits with case Series Name: Mach-Blue Sub-Brand: Stinger Type: Jobber length Bit Diameter (Inches): Assorted Bit Length: Set Maximum Drilling Depth: Set Shank Size: 1/4-in For Use on Fiberglass: Yes For Use on Metal: Yes For Use on PVC: Yes For Use on Stainless Steel: Yes For Use on Wood: Yes Heavy Duty: Yes Material: High-speed steel Package Quantity: 10 Right/Left Hand: Right handed Set/Individual: Set Shank Type: Hex Tip Geometry: 137-degree split-point Warranty: None Brand/Model Compatibility: Universal Compatible Tool: Drills/Impact drivers CA Residents: Prop 65 Warning(s): No UNSPSC: 20121600