AMSUO Silver & Deming Drill Bits, HSS, Step-Tipped, Three Flat Shank — 9/16" to 1", 6" OAL, Black & Gold Finish

AMSUO — PROFESSIONAL DRILLING SOLUTIONS

Silver & Deming Drill Bits · Step-Tipped · 9/16" – 1"

BIG-DIAMETER HOLES IN METAL, WOOD AND PLASTIC

Step-Tipped Point | Three Flat Shank | Black & Gold Finish

8 SIZES · 9/16" – 1" · 6" (152.4 mm) OVERALL LENGTH · 1 PC PER PACK · HSS BODY

Key Selling Points

1. Step-tipped point, 8–11 steps — the point is ground as a series of fine steps (8 steps on 9/16", up to 11 steps on 1"). Each step takes a small cut, so the bit enters sheet metal, tube and thin-wall material progressively instead of grabbing the work and spinning it.
2. Three flat shank — three flats are ground onto the shank so the chuck jaws seat on a flat face instead of relying on friction alone. Less slipping in the chuck under load, and more of the motor's torque reaches the cutting edge.
3. Black & gold finish — a two-tone surface: dark black-oxide areas in the flutes for lubricity and rust protection, gold-tone coating on the working flanks and shank for surface hardness and heat resistance. The contrast also makes wear easy to see.
4. HSS high-speed steel body — holds its cutting edge through the heat of drilling steel and other metals, rather than softening the way carbon steel does.
5. Laser-marked, always identifiable — every bit carries a laser-marked "HSS" + size on the shank: sizes stay readable in the box, in a toolbag and on site.
6. One system, eight sizes — 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16" and 1"; every size is 6" (152.4 mm) overall and packed 1 pc — simple to stock, simple to reorder.

Specification

Size List & Step Chart

1 inch = 25.4 mm. "≈ mm" is a conversion for size selection only, not a machining tolerance. "Steps" = number of ground steps on the point of that size.

Features Explained

Materials & Applications

Target buyers: hardware wholesalers / industrial MRO distributors / electrical and plumbing contractors / private-label tool brands / DIY retail chains.

How to Use

• Check your drill chuck capacity against the bit diameter before use, and make sure the shank is fully seated in the jaws.
• Clamp the workpiece. Large-diameter bits need a firm, stable setup.
• Start at low speed and let the step-tipped point locate the hole; apply pressure only once the point has bitten.
• Use cutting fluid or a suitable lubricant on metal, and clear chips regularly.
• Reduce speed as the diameter increases; for the largest sizes a drill press or bench drill gives the best control.

Packaging & Shipping

OEM / ODM Customization

• Brand customization: laser marking (logo + size) on the shank
• Print customization: pack, label sticker, instruction sheet
• Colour customization: finish options and packaging colours
• Size customization: build to the buyer’s size list (add or remove diameters, change the increment)
• MOQ: on request (to be confirmed by customization type)

FAQ