# Set Specification List (19 Pcs)

Diameter Range: Ø1.0mm ~ Ø10.0mm, Step Size: 0.5mm

Ø1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0 mm

## Machining & Hardness Parameters

Processing: Fully Ground Bright Drill Bits

Zoned Hardness: HRC63–65 from drill tip to 75% flute length; Shank Hardness: HRC14–40

Drill Point: 135° point angle, stable centering, low deviation during drilling

## Product Advantages

Made of premium M2 (HSS-G) high-speed steel with full grinding process, sharp cutting edges, smooth chip evacuation and excellent red hardness, ideal for continuous metal drilling operations.

Differential zoned heat treatment: High hardness on cutting section for outstanding wear resistance and long service life; the shank maintains good toughness to reduce breakage risk under drilling load.

Standard 135° drill point delivers superior self-centering performance, eliminates pilot hole pre-drilling and improves drilling accuracy.

Covers common sizes from 1.0mm to 10mm, one set meets daily metal drilling needs for sheet metal repair, equipment assembly and plumbing & electrical installation.

Packed in a transparent cylindrical case for easy on-site carrying and bit counting.

## Applicable Workpieces

Mild carbon steel, cast iron, aluminum alloy, copper, brass, zinc alloy, engineering plastics and other metal & rigid non-metal plates.

## Compatible Equipment

Electric hand drill, bench drill, magnetic drill press and other conventional drilling machines.

## Safety Instructions

Mandatory PPE during operation: Protective gloves, safety goggles, earmuffs, dust respirator.

Apply proper cutting fluid for metal drilling, control feed pressure to prevent drill bit overheating and tempering.