Spiral Step Drill 3 Piece Set | 1/4" | 4-12mm/4-20mm/4-32mm

• 2 fluted edges for faster, smoother cutting.
• Titanium coated to reduce friction and heat.
• High-speed steel step drill, higher quality, and more durable than an ordinary twist drill.
• Works great in making a smooth, clean, and perfectly round hole.
• Suitable for punch holes through sheet metal, iron plate, aluminum plate, brass, wood, plastic, etc.

Sizes include:

• Includes 3 sizes(4-12mm, 4-20mm, 4-32mm), which meet your different needs perfectly.

Features:

• Type: Drill Bit
• Color: Gold
• Material: HSS 6542/4241
• Shape: Straight, Rotate
• Surface Treatment: Titanium Coated
• Shape of Shank : Triangular
• Triangular Shank Diameter : 6mm
• Size: 4-12mm / 4-20mm / 4-32mm
  
   
  4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm); 15 steps
  4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm); 9 steps
  4-12mm (4mm, 6mm, 8mm, 10mm, 12mm); 5 steps 
  
  Package Includes:
   
  1 x Step Drill Bit 4-12mm
  1 x Step Drill Bit 4-20mm
  1 x Step Drill Bit 4-32mm