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The toolpost is the part of a metalworking lathe which either holds the tool bit directly or holds a toolholder which contains the tool bit. There are a great variety of designs for toolposts (including basic toolposts, rocker toolposts, quick-change toolposts, and toolpost turrets) and toolholders (with varying geometry and features).
More modern versions have elaborated auger bits with multiple blades in various positions. [2] Modern versions also have different means to drive the shaft, resulting in various tools such as braces , wheel drills (the "eggbeater" drill ), and power drills .
A hill-holder is a motor vehicle device that holds the brake until the clutch is at the friction point, making it easier for a stationary vehicle to start uphill. By holding the brake in position while the vehicle is put into gear, it prevents rollback.
Leverage bits have shanks coming off the mouthpiece to create leverage that applies pressure to the poll, chin groove and mouth of the horse are in the category of curb bits. Any bit with shanks that works off of leverage is a "curb" bit, regardless of whether the mouthpiece is solid or jointed.