Dedicated to opening the sliding door orifice, for door processing, elevator processing for sliding doors, iron products, aluminum alloy, light alloy processing. - Size: 4-8 / 5-9 / 5-10 / 6-10 / 8-12 mm - Type: twist drill - DIY Supplies: carpentry - Length: 12 mm - Material: steel - Color: silver - Number of pieces: 5 - Tip type: spiral - Drilling type: drill bit - Drill type: HSS spiral - Drill type: pocket - Package includes: 5 twisted step drills - Only the contents of the above package, other products are not included - Light conditions and different displays may cause the color of the item in the picture to be different from the actual one - The allowed measurement error is 1 to 3 cm