Description

The 3-Piece Step Drill Set 4–32mm (20120000) provides three step drill bits covering the complete range of hole sizes from 4mm to 32mm needed for standard electrical installation work. Step drills are the preferred tool for creating clean, precise holes in steel enclosure panels, electrical trunking, and sheet metal without the need for centre punching or pilot drilling.
Each bit in the set is manufactured from HSS (high-speed steel) with a titanium or black oxide coating for extended cutting life, reduced friction, and heat resistance during cutting operations. The stepped cone profile creates a clean, finished hole edge that rarely requires deburring — saving time compared to twist-drill methods where deburring is almost always necessary.
The three-bit format ensures coverage from the smallest cable gland entry holes through to the larger knockouts for conduit fittings and trunking connectors. Presented in a compact storage case, this set is a practical, space-efficient solution for electricians who regularly need to create accurate holes in sheet steel and enclosure panels.