The Dremel 628 precision drill bit set contains a selection of 7 drill bits suitable for drilling into wood or soft metal. These durable and high-grade steel drill bits can easily drill clean and smooth holes into soft metal, plexiglass, plastic, or wood. The set includes drill bits with diameters of 0.8 mm, 1.2 mm, 1.6 mm, 2.0 mm, 2.4 mm, 2.8 mm, and 3.2 mm, and is housed in a convenient storage case. They are compatible with Dremel tools equipped with a variable chuck, such as the 4486 Dremel Multi Chuck, and have a maximum RPM of 35,000.