HSS Twist Drill Set 6-60mm for Metal Wood Plastic

Large Step Drill - The step drill is designed in 12 steps of drill diameter: 6-60mm (6mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm). Unique enlargement holes, no need to change drill and positioning holes during use. Material - The step cone cutter is made of HSS 4241 high-speed steel and titanium coating on the surface. Anti-rust, anti-wear and heat, longer service life. Spiral design - 135 split tip and 2-groove double-edged design ensure faster and smoother cutting, stable removal and better chip removal. Three-sided shank fits securely in the chuck of power tools and prevents slipping. Surface depth gauge makes drilling accurate. Water-cooled - For workpieces with hardness below 25°; For materials such as metal, wood, aluminum alloy, plastic board, insulation board, etc. What you get - 1 x Twist Drill. Recommended drilling speed 250-400 rpm. Note: The data are all manual measurements, please allow 1-3 cm error; due to the difference in light and display, there may be a certain color difference, please refer to the actual item received.