Step Twist Drill Bits Step Drill Bit For Iron Wood Feature:1. Efficient drilling: This allows the step drill bit to continue working with high efficiency and high drilling accuracy.2. Spiral flute design: allows quick unscrewing and easy removal of particles, which also keeps the drill clean.3. Practical Application: It is ideal for drilling holes on various materials, such as stainless steel, plastic, copper, etc.4. M35 HSS material: good high-speed steel has high harness, not easy to deform, and promises stable and reliable drilling.5. Easy Installation: The mandrel will be firmly fixed on the tool without slipping, and the installation is simple with a small size. Specification:Item Type: Step Drill BitMaterial: M35 High Speed SteelDrill Bit Specification: Approx. 4 - 22mm / 0.2 - 0.9in (4mm / 0.2in, 6mm / 0.2in, 8mm / 0.3in, 10mm / 0.4in, 12mm / 0.5in, 14mm / 0.6in, 16mm/0.6in, 18mm/0.7in, 20mm/0.8in, 22mm/0.9in)Drill Bit Overall Length: Approx. 8cm / 3.1in (Error ± 2%)Package List:1 x Step Drill Bit1 x Storage Box (Random Color)Note: You can use water to cool it down while you work and it will last longer. 1) we accept Alipay, West Union, TT. All major credit cards are accepted through the payment processor's secure escrow. 2) Payment must be made within 3 days of placing the order. 3) If you can't check out immediately after the auction ends, please wait a few minutes and try again, payments should be completed within 3 days. About Shipping 1.