
M42 8% Cobalt Bi-Metal Variable-Pitch (4/6 TPI) Heavy-Duty Hole Saw
Industrial M42 bi-metal hole saw with 8% cobalt electron-beam welded tooth edge and 4/6 variable pitch geometry for fast cutting in stainless steel, cast iron, and wood.
Category · Hardware & Hand Tools
Industrial diamond blades, core drill bits, PPE safety equipment, automotive maintenance sets, and workshop hand tools. Process-matched to buyer drawings with 100% pre-shipment inspection and delivery from any port in China.

Industrial M42 bi-metal hole saw with 8% cobalt electron-beam welded tooth edge and 4/6 variable pitch geometry for fast cutting in stainless steel, cast iron, and wood.

Industrial rotary hammer drill bit with monoblock 4-cutter cross carbide head and twin helical flutes, engineered for reinforced concrete, rebar encounters, and granite.

Heavy-duty DIN 8039 masonry drill bit with copper-brazed YG8C tungsten carbide tip, designed for percussion impact drilling in brickwork, concrete block, and stone.

Heavy-duty Chrome-Vanadium (Cr-V) brad point woodworking drill bits with mirror-polished flutes for precision doweling, hardwood joinery, and timber construction.

Precision brad point wood drill bit with 1/4" hex shank and dual outer cutting spurs for tear-out-free blind and through holes in hardwoods, MDF, and cabinetry.

Impact-ready 1/4" (6.35mm) hex shank HSS twist drill bit designed for rapid bit swaps in cordless impact drivers and drills without chuck slipping.

Precision aircraft extension twist drill engineered to NAS 907 standards with 6" (152mm) and 12" (305mm) reach for aerospace, HVAC, and deep recessed framework drilling.

Heavy-duty 1/2" (12.7mm) reduced shank Silver & Deming drill bits allowing portable handheld drill chucks to drill large holes from 13mm (1/2") up to 38mm (1-1/2").

Economical double-ended HSS drill bit offering two cutting tips on a single body, doubling drill life for automotive body assembly, HVAC ducting, and sheet metal riveting.

Extra-long series Morse taper shank twist drill to DIN 341, delivering extended penetration depth for large castings, die blocks, and thick offshore steel plates.

Heavy-duty DIN 345 industrial twist drill bit with precision Morse taper shank (MT1 to MT5) designed for radial drill presses, industrial lathes, and boring mills.

American standard taper length drill bit featuring the long flutes of taper-shank drills combined with a convenient straight shank for standard industrial chucks.