No need to find an electrical outlet with a gimlet. These high-quality tools are hardened to the end of the flute, and the screw thread is specially annealed to make sure that it is not easily broken. The double spiral flutes are machined, rather than twisted, and will quickly and easily allow wood chips to clear the hole. Keep a set in the house, in the kitchen, and with your garden tools. An inexpensive, traditional, and extremely useful tool. Includes: Size 3, 4, 5, and 6mm.