Drill bit shank A hex shank can be grasped by a 3-jaw drill chuck or held in a chuck specifically for hex shanks. Quarter-inch hex shanks are common for machine screwdriver bits and have spread from that application to be used for drill bits that are compatible with screwdriver machinery. The diameter of an SDS and SDS Plus shank is 10 millimeters. (The SDS Max is 18 millimeters.) The SDS shank has the advantage of fitting into a simple spring-loaded chuck, so that bits are simply pushed into the chuck without tightening. This shank and chucks made for it are especially suited to
Drill bit gimlet bit cuts the side of the hole. The hinge sinker bit is an example of a custom drill bit design for a specific application. Many European kitchen cabinets are made from particle board or medium-density fiberboard (MDF) with a laminated melamine resin veneer. Those types of pressed wood boards are not very strong, and the screws of butt hinges tend to pull out. A specialist hinge has been developed which uses the walls of a diameter hole, bored in the particle board, for support. This is a very common and relatively successful construction method. A Forstner bit could bore