Kaufhof 20 piece drill set comes in a very convenient dispensing box. Slide the top to the drill you want, tilt, and out it comes. It's a nicely crafted set that will prove to be a great companion for kit building.Will Fit most rotary tools with the proper collet or chuck. With this set you would be able to drill wood, plastic and other soft metals or you can make precision micro holes for jewelry. Complete with a micro index; extract each individual drill with ease. Specialty designed box keeps bits securely in place and dispenses one drill at a time.