5/16 In. Cobalt General-purpose Drill Bit

Presenting the ARTU 5/16 in. Cobalt General-Purpose Drill Bit: a rugged, tool built for both rotary and hammer drilling. The cobalt-tipped edge and reinforced cutting surface let you bore through hardened steel, ceramic tile, marble, granite, brick, and concrete with confidence. The no-center-punch design prevents wandering, and a backward-ground grind profile ensures the tip starts cutting smoothly with a filing-like action. A chrome-vanadium shank provides dependable strength, while the flat-bottom parabolic flute promotes fast, clean chip removal.

Benefits: This drill bit delivers long wear life, versatile performance, and accurate hole size across multiple materials, making it ideal for both DIY projects and professional use.

• Cobalt-tipped edge delivers superior hardness and heat tolerance for metal, tile, and masonry drilling, reducing wear and extending service life.
• Broad material compatibility including hardened steel, ceramic tile, marble, granite, brick, concrete, glass, PVC, plastic, fiberglass, and wood for versatile projects.
• Anti-wander design with no center punch required to start holes cleanly and accurately on tough surfaces.
• Resharpenable on standard silicon carbide grinding wheels to maintain performance without replacing the bit.
• Chrome-vanadium steel shank and ANSI-compliant construction ensure durability and reliable hole sizing on every job.

Why this drill bit stands out: Combining premium materials, precise geometry, and practical features, the ARTU 5/16 in. cobalt bit delivers clean holes, reduced wandering, and longer life for professional results across metal, tile, masonry, and wood drilling tasks.