Top 9 21mm Drill Bit Metal UK – Drill Bit Sets

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1. Yaowanguan

Yaowanguan Metal Twist Drill Bits-21mm High Speed Steel Spiral Drill Carbide Auger Hole Opener for Cast Iron/Aluminium/Copper/Wood/Plastic/Iron Sheet

Yaowanguan - Please control the engine speed while using the Yaowanguan metal twist drill bit, recommend speed:100-800r/min. The yaowanguan metal twist drill bits is double posterior horn which improve position accuracy and reduce resistance, makes the drill bits more durable and effective.

The yaowanguan metal twist drill bits spiral Drill Carbide Auger Hole Opener is for Cast Iron/Aluminium/Copper/Wood/Plastic/Iron Sheet. Different size for your various needs. The yaowanguan metal twist drill Bits is made of high quality high speed steel with special sharpening technology, high hardness, sharper opening. The yaowanguan metal twist drill bit is suitable for copper, wood, angle iron, aluminum, plastic, iron sheet, widely used in home decoration, cast iron, manual DIY and other scenes.
Part NumberDrillbitmetaltwist-21

2. Rennie Tool Company

Wood, Non-Ferrous Etc. 21mm, Steel, 21mm HSS Blacksmith Drill Bit, Reduced Shank Drill for Aluminium, Plastic

Rennie Tool Company - Flute length - 78mm. All orders are despatched from our factory In Manchester, UK, The Same Day If Ordered Before 3pm. Overall length - 150mm. Manufactured to din338 & BS328 Standard. 12. 7mm diameter Shank.
BrandRennie Tool Company
ManufacturerRennie Tool Company
Part NumberF-MBDM-1

3. Sourcingmap

Sourcingmap 21mm HSS Drill Bit Hole Saw Cutter for Metal Alloy Wood

Sourcingmap - 21mm hole saw cut clean, round holes in iron, alloy plate, aluminum plate, plastic sheet. Hole drill bit is with special heat treatment, sharp edge, high strength. Perfect for installing locks, knobs in Doors and Cabinets or Drilling Larger Diameter Holes Through Desks Etc. Hole saw is suitable for hand-held electric drill, vertical electric drill and mobile belt magnetic drilling machine. Hole saw is made of HSS high speed steel, impact resistance, wear resistance.
Part Numbera18072800ux0444

4. sourcing map

With Titanium Coated Center Drill, Hole Saws for Stainless Steel Sheet Metal, sourcing map 21mm Carbide Hole Cutter, Non-Slip Triangular Shank Limit Step

sourcing map - Carbide hole cutters are with longer life than normal metal cutting hole cutters. General purpose: can provide fast and precise cuts into stainless steel sheet, cast iron plate and other metals.

All in one: drill bit, spring, wrench are included. Application: can be used on hand held drill, magnetic drills, bench drills, pneumatic drills and other rotating machines. Suitable for round or square pipes, equipment cabinet. Hole cutter: cutting dia. 21mm / 083"; shank size: 10mm / 039"; cutting depth: 26mm / 1. 02", non-slip triangular shank. Please add coolant or water when working on stainless steel and steel metal sheets above 5mm. No need to buy any extra accessories for the drilling works. Tips: keep the drill running evenly at a low speed or pre-drill the center hole for extending hole cutter life.
Brandsourcing map
Manufacturersourcing map
Part Numbera20082700ux0143


GRANDLIN Cobalt Step Drill Bit,Titanium Coated 4-22mm/5-21mm Step Cone Drill 1/4"Hex Shank for Wood, Sheet Metal Precision Drilling and Hole Cutter, Stainless Steel

GRANDLIN - Can work without coolant. A substantial increase in the wear resistance and oxidation resistance. Fast-starting, non-walking drill tip. Suitable for aluminum, aluminum, 304 stainless steel, insulation board, carbon steel, steel, sheet metal, pvc board chamfer, etc. 1/4 inch hex shank design.
Height0.99 cm (0.39 Inches)
Length0.99 cm (0.39 Inches)
Width0.99 cm (0.39 Inches)
Part Number11471405669

6. Rennie Tool Company

21mm HSS Cobalt Blacksmith Drill Bit, Reduced Shank Drill for Stainless Steel & Hard Metals

Rennie Tool Company - All orders are despatched from our factory In Manchester, UK, The Same Day If Ordered Before 3pm. Manufactured to din338 & bs328 standard /// 118 Degree Point Angle. 12. 7mm diameter shank /// flute length - 76mm /// Overall Length - 150mm. Made from hss cobalt hsco material so A Lot Tougher Than Your Standard HSS Drill. Ideal for drilling in steel, high tensile steel stainless upto 1. 400n/mm2, cast iron, none-ferrous metals, Cast Steel, Hard Plastics And Resistant To Heat And Wear.
BrandRennie Tool Company
ManufacturerRennie Tool Company


Metal, Plastic, M42 Hole Opener, Wood, Stainless, Pipe, SENRISE Bi Metal 21mm Hole Saw Tooth Cutter Drill Bits Cutting Opener for Iron Aluminium

SENRISE - Package included: 1 x Hole Saw drill bit. Taking the form of a short open cylinder with saw-teeth on the open edge, knobs in doors and cabinets. Widely used in plate hole, perfect for installing locks, Home Wood, Fire Pipe, Plastic and Other Opening Operation. The newly designed chip removal groove, it can discharge the chip rapidly, and will not cause the crack and stuck piece phenomenon. 49 size hole saw for choice: 15mm-200mm, a solutions to all dimensions of the problem. Made of premium M42 high speed steel, sturdy and durable.
Part NumberHA1767G


Fiberboard, Cornhole Board Drill Bit with Positive Rake Teeth for Soft Metal, Plastic, KATUR 21mm Speed Bi-Metal Hole Saw, Wood, Drywall

KATUR - 100% high cemented carbide steel with central axis. Cemented carbide steelMade of cemented steel, which is four to seven times faster cutting than high speed steel.

Buy with confidencewe offer "two year" warranty on items that confirm to be manufacturer defect. We'll respond within 24 hours on weekdays. Please clamp the shaft in right place and necessary protective measures in woodworking processing. Design forbi-metal hole saw is designed for drilling metal sheet, wood, plastic pipe, drywall, PVC and fiberboard hole. Sharp and durableit has stable mechanical properties, high wear resistance and high impact resistance, ensuring a long life. Bi-metal hole saw10mm shank, 21mm diameter.
Part NumberBT-5042-21

9. sourcing map

Sourcing map Forstner Drill Bits 40mm, Tungsten Carbide Wood Hole Saw Auger Opener Woodworking Hinge Hole Drilling Boring Bit Cutter Gray with Case

sourcing map - The cutting edge and tip of the hole opener should be sharpened in time. Specifications: drilling dia. 40mm; shank size: 9mm; drilling depth: 48mm; total length: 80mm. Rotation speed suggested: 1200-6000 RPM, feed speed suggested: 8-12M/Min. Applications: can be used for drilling holes on wood and plastic products, door hinge.

Features: tungsten carbide cutting tip with special heat treatment for sharp cutting edge, non-burrs and durable use. Processing hardwood or other hard materials should be injected with water to improve the quality and accuracy of drilling, and extend the life of the hole opener. How to use: suitable for bench drill, hand held electric drill, impact drill, vertical drilling machine, CNC carving machine and other drill press.

Arc curve design head for easy chip-removal, high hardness, more efficient perforation. Before drilling, be sure no nails or other metal objects in wood to avoid causing damage to forstner drill bits. Warm tips: can not drill metal and non-ferrous metal, otherwise the hole opener will be damaged quickly. Used on cutting wood, plywood, plastics, MDF, solid wood boards, furniture, fiberglass etc. Round shank, cemented carbide cutter and solid hardened steel body.
Brandsourcing map
Manufacturersourcing map
Height3.99 cm (1.57 Inches)
Length10.01 cm (3.94 Inches)
Width3.99 cm (1.57 Inches)
Part Numbera18121400ux0136