Set of 3 Step Drill Bits. Steel Step Milling Cutters. HSS 4-12/4-20/4-32

High-Quality Material: Step Cone drill bits are made of high-speed steel and coated with titanium nitride to reduce friction heat and promote cooling. Strong and durable.

Double Flute and Split Point Design: The double flute and split point design prevents slippage, quickly clears chips, and deburrs holes with reduced pressure, resulting in faster and smoother drilling and cutting.

3 Pitch Sizes: Different sizes can meet various needs. Designed for precision drilling of holes of different sizes from 4mm to 32mm in diameter. Covering various pitch sizes helps drill or enlarge different holes with a single bit, ensuring optimal speed and accuracy.

Material: HSS Steel + Titanium Coated

Type: Pillar Drill

Quantity: 3PCS

Color: Gold Usage: Used in gun drilling, bench drilling

Size: 5-pitch jaws: 4-12mm (4mm, 6mm, 8mm, 10mm, 12mm). 9-pitch jaws: 4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm). 15-bit pitch set: 4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 2mm). Note: 1. Wear safety glasses before drilling. 2. Please cool with water while working due to the high temperature. This will prolong the life of the drill bit and prevent clogging. 3. The recommended speed is 250-400 RPM.