DIY, HSS Step drill. Straight flute

ESTINK Straight Flute Drill,5PCS Step Drill Bit Set HSS Metric Straight Flute Drill For Drilling Steel Plate,Step Drill Bit

Step Drill Bit for Stainless Steel

These step drill bits are made with M35 cobalt. It is ideal for variety of materials from stainless steel, metal, plastic, fiberglass to wood. They also help to enlarge existing holes. M35 HSSCo is a high speed steel alloy made up of 5% cobalt. M35 is similar to M2, but with 5% cobalt added.

TEMO 3PC M35 Cobalt HSS Step Drill Set Two Flute Total 28 Sizes (3/16 inch-1/2 inch 6 Step, 1/4 inch-3/4 inch 9 Step, 1/8 inch-1/2 inch 13 step)

Bristol 6-40mm 12 Step Step Drill Straight Flute BTWSD6-40

3pcs Step Drills Metric Spiral Flute The Pagoda Shape Hole - Temu

5 35mm HSS Step Conical Drill Bit 13 Steps Round Shank Straight Flute Step Drill Rotary Tool Essential Hardware Tool Pagoda Drill From Dejx, $25.65

NEE Straight Flute Step Drill Set, Round Shank HSS Drills for Drilling : : Home Improvement

Step drill HSS, spiral fluted with split point

Wholesale high quality wood step drill Available In Various Types And Diameters

M35 Cobalt Four Spiral Flutes Step Drill Bits for Metal

Xtorque XSDS3 3pce HSS Metric Step Drill Straight Flute M2 Set - AUSTRALIA BRAND

5pcs HSS High Speed Steel Cobalt Titanium Step Drill Bit Multiple Hole – XtremepowerUS

Straight Flute 3 Piece Step Drill Set - 4-12, 4-20, 6-30mm