HJR 4-12 mm High Speed Steel Step Drill Bit Set, Titanium Coated Spiral Groove Hole Cutter 3pcs

Description

Package includes: 3 pcs HSS Groove Step Drill(4-12mm*1, 4-20mm*1, 4-32mm*1) Packing form: Transparent plastic box Material: High Speed Steel Coating material: Titanium Features: Step drill Usage: Suitable for use in general hardness work pieces whose hickness below 5mm, such as iron, aluminum, stainless steel, copper plates, insulation boards, PVC sheet, ect. Size: ①4-12mm: 5 Steps (4mm, 6mm, 8mm, 10mm, 12mm) ②4-20mm: 9 Steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm,16mm,18mm,20mm) ③4-32mm: 15 Steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm)