Titanium Coated Step Drill Bit Set HSS Hex Shank Metal Multiple Hole Step Drill Bit Kit with Impact Driver for DIY Woodworking Metal Plastic3PcsSet 412420432mm

3Pcs High-Speed Steel Step Drill Bit Set, Cone Titanium Coated Metal Hole Cutter 1/4" Hex Shank Drive Quick Change 4-12mm/4-20mm/4-32mm Features: Titanium coating, reduce friction, long service life. Suitable for plates with hardness less than 25 degrees and less than 5 mm (such as wood, iron, carbon steel plate, etc.) Specifications: ? Material: Titanium coated high speed steel ? Parameter: 4-12 mm 5 Steps (4 mm, 6 mm, 8 mm, 10 mm, 12 mm) 4-20 mm 9 Steps (4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm) 4-32 mm 15 Steps (4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 24 mm, 26 mm, 28 mm, 30 mm, 32 mm) ? Hex Shank: 1/4 inch quick change Reminder: ? The service life of step drill bits can be prolonged by using cutting fluid. ? The thickness of the plate must be thinner than the gradient of the step drill bits. ? It can be used with the center to assist drilling. Package Included: 3 x Step drill bits