Specifications:
Product Name: Double Blade Step Drill.
Material: HSS
Coating: Titanium Nitride Coating
Drilling Dimensions: 4-20 mm <9 steps> (4/6/8/10/12/14/16/18/20), 4-12mm <5 steps> (4/6/8/10/12), 3-12mm <10 steps> (3/4/5/6/8/9/10/12)
Shaft Diameter: Hex shank (0.25 inches (6.3 mm)
Hole Plate Thickness: 0.16 inch (4 mm), Aluminum 0.16 inch (4 mm), Wood, Vinyl Resin, Plastic 0.2 inch (5 mm)
Uses: For drilling copper, aluminum plates, wood, resin, etc.
Package Includes: 1 x Step Drill (9 steps 4-20 mm) 1 x Step Drill (5 steps 4-12 mm) 1 x Step Drill (10 steps 3-12 mm) 3 x Bit Holder 1 x Carabiner;Total 7 Pcs SetIncludes a dedicated storage case.Prevent your drill from falling or losing