Product Name: A 4-22 mm feather from Total Name in English: Total Tac8242201 Step Drill 4-22mm Country Country: China Manufacturer: Total Product Description: It is a tool designed for drilling in many materials accurately and easily. The feather contains different degrees of diameter, allowing you to dig holes of different sizes without the need to change the tool. Suitable for use in iron, steel, plastic, wood, aluminum, copper, acrylic, glass and other materials. Provides a strong and sharp head for smooth drilling and engraving without a great effort. Usually used in crafts and industrial works, hobbies and home equipment technical specifications: Step: 4-6-8-10-14-16-16-18-20-22 mm model number: tac8242201