This 3 piece set of titanium nitride coated, steel step drill bits replaces 28 individual drill bits so you save time on switching out drill bits. The step drills deburr holes automatically and feature a two-flute design for faster, smoother drilling. Quick Change 1/4" Shank. Complete with nylon storage bag. Ideal for thin metal, e.g steel, aluminium, copper, fibreglass, etc.

Features:

• Titanium coated for durability
• Sizes 4-12mm,4-20mm, 4-32mm
• Steps in 2mm increments
• Perfect for cutting stepped holes in steel, brass, plastic, and wood
• Self centering split point makes it easy to get the hole started
• Made from high grade, high speed, steel and titanium nitride coated for excellent hardness

Specifications:

• 9 Step Bit - 4 to 20mm
• 13 Step Bit - 4 to 12mm
• 15 Step Bit - 4 to 32mm
• Quick Change 1/4" Shank