5-piece step drill puncher

Made of premium high speed steel, wear resistant, not easy to rust, has a long service life. Double groove design for faster and smoother cutting. Different specifications can meet different drilling requirements. Aluminum box can accommodate and protect drill bits. suitable for parts with hardness less than 25 °, such as carbon steel, iron plate, aluminum plate , PVC plate, wooden plank, etc. Specifications: Material: high speed steel 4241 Quantity: 5pcs Size: 1/4 "to 1-3 / 8" (10 steps): 1/4 ", 3/8" 1/2 ", 5/8", 3/4 ", 7/8", 1 ", 1- 1/8", 1-1 / 4 ", 1-3 / 8 "to 3/16" to 7/8 "(12 steps): 3/16 ", 1/4", 5/16 ", 3/8", 7/16 ", 1/2", 9/16 ", 5/8", 11/16 ", 3/4", 13/16 ", 7/8" 1/4 "to 3/4" (9 steps): 1/4 ", 5/16", 3/8 ", 7/16", 1/2 ", 9/16", 5/8 ", 11/16", 3/4 " 1/8 "to 1/2" (13 steps): 1/8 ", 5/32", 3/16 ", 7/32", 1/4 ", 9/32", 5/16 ", 11/32", 3/8 ", 13/32", 7/16 ", 15/32", 1/2 " 3/16" to 1/2 "(6 steps): 3/16 ", 1/4", 5/16 ", 3/8", 7/16 ", 1/2" Shank diameter: 1/4 "to 1-3 / 8 ": 8 mm / 0.3 in. 3/16 "to 7/8": 8 mm / 0.3 in. 1/4 "to 3/4": 8mm / 0.3in 1/8 "to 1/2": 6 mm / 0.2 in. 3/16 "to 1/2": 6 mm / 0.2 in Package size: 152 * 107 * 43mm / 6.0 * 4.2 * 1.7 inch Package weight: 502g / 1.1lb Packing List: 5 * Stepper Drill Note: This does not include other things, the color is based on the first picture, and other pictures only show The effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!