Thoughtful Design: Compared with an ordinary twist drill, it is not easy to break, and has small shaking, and can drill a beautiful aperture without needing to use the center punch. Moreover, it can also complete the functions that the twist drill cannot complete, such as deburring, chamfering, opening round holes, reaming holes, and so on.
eBay
New HSS Steel Large Step Cone Drill Titanium Bit Set Hole Cutter. Made from high quality HSS steel. 3Pcs Drill Bits + Storage Pouch. With the Titanium coated to reduce friction and heat. Heat treated and highly polished.
eBay
3Pcs Large HSS Steel Step Cone Drill Hole Cutter Titanium Bit Set 4-12/20/32MM. Our step drill bits are then coated with titanium for superior durability. 4 ~ 32mm (4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm), 6.35 mm shank.
eBay
Specification: ①.4-12X5(4-6-8-10-12) ②.4-12X9(4-5-6-7-8-9-10-11-12) ③.4-22(4-6-8-10-12-14-16-18-20-22) ④.5-23(5-7-9-11-13-15-17-19-21-23) ⑤.4-32(4-6-8-10-12-14-16-18-20-22-24-26-28-30-32) Material:HSS M35 Co Coated:TiAIN Blade:3 Flutes Handle:6.35mm(1/4" shank) 3 Flutes HSS-CO M35 Spiral grooved Step TiAIN Drill Bits Cut Tool Set.
eBay
New HSS Steel Large Step Cone Drill Titanium Bit Set Hole Cutter. Made from high quality HSS steel. 3Pcs Drill Bits + Storage Pouch. (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm). (3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm). ).
eBay
(The step cone cutter made of HSS and Titanium coating on the surface. Anti-rust, anti-wear and heat, made longer life. 1x HSS Step Drill. 50mm, 55mm, 60mm). Widely used to cut holes in a variety of material like steel, wood, thin iron, aluminum alloy, insulation boards, PVC sheet, ect.
eBay
3Pcs Large HSS Steel Step Cone Drill Hole Cutter Titanium Bit Set 4-12/20/32MM. Our step drill bits are then coated with titanium for superior durability. 4 ~ 32mm (4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm), 6.35 mm shank.
eBay
Material: HSS Steel. 4-12 mm (4, 5, 6, 7, 8, 9, 10,11,12mm) 4-20 mm (4, 6, 8, 10, 12, 14, 16, 18, 20mm) 4-32 mm (4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm). 1 Pcs x 4-32mm Step Cone Drill.
eBay