Any of a number of handles or tools shaped like the letter T. Example of a t-handle for holding a tap is shown below.

An extra wide T-shaped steering mechanism utilized on Crown's PC and TR models which contains the controls for travel , raise, lower, horn, and brakes. The wide handle allows the operator to walk along the side of the truck and move the truck forward without getting back on the truck.

Low-profile replacement window crank. T-handles provide adequate leverage without obstructing window coverings, fit most brands of windows, and are available in several colors. [Photograph