Precise and Precise: Most common use is for precise drilling when working on small projects. The knurled handle allows for proper leverage when turning the pen vise for speed and precision. Adjustable This hand drill has an adjustable drill holder that fits the different drill sizes. Offers you a wide range of uses. Wide range of applications This hand drill is used to hold and rotate small drill bits, for working on models, wood, jewelry, amber, plastic and many other DIY projects that need to precisely drill holes. Durability The drill bit is hardened steel to make sure this drill bit is ready for whatever hobby and precision work you can throw at it and do your precision constructions. Portable: pen size, easy to carry and store. 20 different sizes of drill bits can meet your different needs.