PFERD 25201037 HSS Step drill bit 4 - 20 mm

4mm to 20mm Spiral Flute Step Drill Bit, High Speed Steel Titanium Coated, Metric Hex Shank, HSS Tool For DIY Plastic Wood Steel Metal Aluminum Copper. Cone Cutter Hole Cutter Drill Bit

PFERD HSS Step Drill, 9 Steps Diameter 4-20 mm, 3-Surface Shank Diameter 8 mm, 25201037 - for Burr-Free Drilling

Blue Spot Tools Step Drill HSS Steel Titanium Cone Bit Hole Metal Cutter Tool 4-42mm

3Pcs HSS Spiral Step Drill Bit, High Speed Steel Step Drill Bits Set for Metal, Cone Cutter for Wood Stainless Steel Iron Plate Metal Plastic Aluminum PVC Board Sheet (4-20mm, 4-12mm, 3-12mm)

Gunpla 3 Piece HSS Spiral Step Drill Bits Set, Titanium Coated Hex Shank Drilling Bit Kit for Wood, Stainless Steel, Iron Plate, Aluminum, PVC Board 4mm to 32mm

YOKOCUT Cobalt Step Drill Bit for Stainless Steel and Hard Metal, High Speed Steel 6% Cobalt Step Bit with AlTiN Coating, Cone Drill Bit Multiple Hole Cutter (4-32mm, 15 Steps)

Step Drill Bits, 4mm-20mm Cone Cutter, HSS Hexagonal Shank Hole Saw Drill Bits for Metal Plastic Wood

FOCSTOL Cobalt Step Drill Bit - 4-22mm Four Spiral Flute HSS Step Drill Bit M35 with Quick Change Hex Shank for Stainless Steel Metal Aluminium Copper Plastic Wood

THINKWORK Four Spiral Flute Step Drill Bit Set (Metric), 5 Pcs HSS Step Drill Bits (4mm-35mm) Unibit Step Drill Bit, 6mm and 10mm Shank Step Bits for Aluminum, Wood, Plastic, Metal

Bosch Professional HSS Step Drill Bit (for Metal and Plastic, Ø 4 – 20 mm, Length 70.5 mm, Drill Accessories)