Feature: Titanium coated to reduce friction and heat. This drill bit set includes 3 sizes(4-12mm, 4-20mm, 4-32mm), which meet your different needs perfectly.
Note: 1. Hand drill and bench drill can be used for these step drills. 2. Use water injection for cooling when drilling, which can effectively prolong the using life of drill bit. 3. Recommend drilling rate of 250-400 RPM. 4. You can drill sheet within 5mm with our step drills. 5. Remember that only M35 step drill is for stainless steel. Never use these HSS 4241
Specifications: Material: High-speed Steel (HSS 4241) Surface Treatment: Titanium Coated Shape of Shank: Hexagonal Shank Diameter: 6.35mm (Hex Shank) Overall Length: 4-12mm Length: Approx. 66mm/ 2.60" 4-20mm Length: Approx. 76mm/ 2.99" 4-32mm Length: Approx. 102mm/ 4.02" Sizes: 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 Item Weight: Approx. 229g / 8.08oz Package Weight: Approx. 244g / 8.61oz Package Size: Approx. 11 * 9 * 3.5cm / 4.33 * 3.54 * 1.38in
Package Included: 3 set of step drill
