1/4″ hex shank countersinks are fine for a quick drill. They don't slip in drill chucks. You can make deep countersinks easily by setting the countersink's depth stop to allow the countersink to drill more deeply into the worksurface.
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8-25mm diameter Cross Bit,Alloy Electric Hammer Drill Concrete Through Wall Hole Impact Drill Bit,For electric drill bits
Aliexpress UK
Degrees: 60 Material: High Speed Steel Color: Silver Package Including:5/6PCS center drills Type: Center Drill Bit Note: 1.Please allow error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
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XCAN HSS Twist Drill Bits 0.3-1.6mm Mini Drill Bit Set For Precision Crafts Jewellery Watch Repair Model Making Spiral Drill Bit
Aliexpress UK
Material: High Speed Steel HSS. Shank type: round. 6x Drill Bit. Handys Zubehör. Hardness: 65. Sizes: 6.3 8.3 10.4 12.4 16.5 20.5mm. Gesundheit & Schönheit. Product View.
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VESSEL Drill Storage Sockets for 5 Bits /10 Bits 4 Colours Available Durable Portable Bit Holder BH-05D/K/N/R BH-10D/K/N/R
Aliexpress UK
This set is indispensable for woodworking enthusiasts, cabinet makers, and anyone striving for a professionally finished product. Adjustable 3in1 Woodworking Countersink Drill Bits Set. Searching for precision and versatility?.
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XCAN 1pc 4-10mm Left/Right Rotation Wood Forstner Drill Bits Router Bit Row Drilling 2 Flute Wood Hole Cutter Gang Drill Bit
Aliexpress UK
This Center Drill Bit Set features a 60-degree angle countersink design suitable for various materials like wood, stainless steel, aluminium, iron, nickel, brass, copper, and steel. Angle: 60-Degrees.
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Magnetic Driver Bit Set 6 Magnetic Bits D1 Alloy Steel Impact Resistance Long Cross Driver Bits 1/4in Hex Shank for Drills
Aliexpress UK
Bosch 3-piece countersink bit set 50 mm / 6-8 mm / 8; 10; 12 mm 2608596667. Picture is for illustration purpose only. Total length mm: 50. UK Offshore - Scottish Islands, Channel Isles, Jersey & all other UK Islands.
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JRDS PCB Engraving Bit 3.175mm Shank V Shape Carving Bits 10-90 Degrees Carbide CNC Router Bit Tipped 0.1mm Wood Milling Cutter
Aliexpress UK
Material: High Speed Steel HSS (4241). Shank type: round. 6x Drill Bit.
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1/4"Shank 8mm shank taper 1PC Tungsten Steel Drill Bit Nano Blue Coated Cutter Carbide Router Bit CNC End Milling Bit
Aliexpress UK
Material: High Speed Steel HSS. Shank type: round. 6x Drill Bit.
eBay
Tideway Bottom Cleaning Router Bits For Wood 1/2 1/4 Inch Shank Woodworking Bits Flat slotted Cutter Professional Grade Bits
Aliexpress UK