Top 10 Best 21/64 Drill Bit

Ideal for drilling in tough metal, including heavy-duty abrasive alloy metal drilling on hardened steel. Made from industrial grade High-Speed Steel for increased durability. 8 Cobalt alloy is heat and abrasion-resistant. 135-degree split-point tip starts drilling immediately with less force and eliminates walking across the work surface. Bit has a straight shank.

Super-hard titanium coating lasts up to six times longer than high-speed steel. Self-starting point starts on contact. Balanced double flute eliminates chatter and vibration. Titanium reduces heat for longer life. Drills clean, accurate holes in these thin materials up to 18 In. sheet metal, ducts, steel, copper, brass, aluminum, plastic, plexiglass, wood, veneers, vinyl siding, plasterboard, PVC, stainless steel and cast iron.

Titanium Coated Classic 4241 High Speed Steel construction with Titanium Coating for proven capability and durability.. Strength Hardness Made with HSS 4241 steel, Rock wall Hardness Level HRC 60-62.. Package Size 5 Pieces in a plastic bag, Diameter 2164 inch, Total length 4-58 inch, Working length 3-516 inch.. Professional DIY Use For use on metal, wood plastics, Not For Use On Concrete Masonry Stainless Steel. Perfect match for workshop or service vehicles.. 135 Tip Twist Design Increases cutting speed with self-centering and prevents walking, clears chips and particles faster..

Pilot Point tip starts on contact for clean, accurate holes and reduces lock-up on breakthrough. No-spin shank eliminates the frustration of bit spinning in the chuck. Tapered web provides greater durability to reduce breaking.

COBALT STEEL - Manufactured from M35 cobalt steel, with molybdenum and cobalt added to create a hardened heat-resistant alloy, measuring Rockwell hardness up to 67, for much faster cutting and extra longer life span, with up to twelve times compared with an average HSS drill bit.. SELF CENTERING - The 135quick-cut pilot split points are self-centering and can penetrate quickly with less pressure. The bits will not walk or wander. Straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks.. 5PC 2164 FRACTIONAL INCH BITS - The set includes 5pcs of M35 cobalt steel twist drill bits, well orgnized in a tough PVC case for easy storage. Total length 4.6 working length 3.3. Manufactured to German DIN338 standard.. FOR METALWORKING - Particularly successful in cutting through hard metalshardness less than HRC38 such as stainless steel and cast iron, although they can be used for softer materials like copper and aluminium, too. Not for hardened steel high carbon steel. Try to adjust the RPM when it fails to penetrate.. DOWNLOADABLE USER GUIDE - We've summed up some tips of drilling metals, including a RPM chart for several common metals, based on our reviews and some articles on the internet. In most cases, our customers would get a much better result with these tips. Welcome to download..

Great product and very good quality. Made from M35 Hight-speed Steel and 5 Cobalt.Size2164inch,Total length115mm,Work length75mm. The blades are very sharp and they drill into metal fast.Including Steels,Cast Iron ,Copper,Galvanized Pipe,Aluminum Alloy,Wood, Plastic and Other Hard Metals.If you need to drill hard metal, Highly recommended use drilling press contral the RPM.Not for Glass or Ceramic Materials.. Full-grinding Nitriding,Good Wear resistance,Durable,Spiral groove design, well chip removal performance.135 Tip Twist Design,Increases cutting speed with self-centering and prevents walking.. For Professional and DIY Use, household maintenance and repair.These are so good to save times. Works great and good price, Will be a good assistant in your work.

Effective in drilling tough, high tensile strength materials like stainless steel, inconel and titanium. 135 split point tip prevents drill from walking. Round shanks allow use with a wide variety of tool holding systems. Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools performance is similar to uncoated tools. 12 overall length for drilling where extra length for reach is required.

High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. Gold and black surface treated for use in stainless steel and other hard metal drilling. These round shank tools have flats ground onto three sides to reduce slippage of the bit when used in drill chucks. When run in a counterclockwise direction right-hand cut spiral fluted tools evacuate chips up and out of the cut to reduce clogging. Heavy duty 135 split point for self-centering and reducing thrust.

Titanium Coated Classic 4241 High Speed Steel construction with Titanium Coating for proven capability and durability.. Strength Hardness Made with HSS 4241 steel, Rock wall Hardness Level HRC 60-62.. Package Size 10 Pieces in a plastic bag, Diameter 2164 inch, Total length 4-58 inch, Working length 3-516 inch.. Professional DIY Use For use on metal, wood plastics, Not For Use On Concrete Masonry Stainless Steel. Perfect match for workshop or service vehicles.. 135 Tip Twist Design Increases cutting speed with self-centering and prevents walking, clears chips and particles faster..

Ideal for general wood drilling and especially for making dowel holes. The lip and spur tip design helps to prevent tearing wandering on flat surfaces. Produces clean cuts.