Abstract: I designed the Clamp-it-Once fixture as a work holding device as a better version of an angle plate. Clamp-it-Once is used for grinding, inspection or machining components square. It's design and components are extremely simple and basic, but radically different than other work holding devices currently being used. Because the main block is square without an inside angle or corner, it has more stability, increasing accuracy. The clamps are very close to the work piece providing direct force on the component securing the work piece with superior force. The clamps are inboard of the block eliminating the step of having to switch clamps; for example the grinding of the 2nd side (90 deg. side of a component). Upon release of the clamps, they remain stationary for multiple pieces to be worked on. The Clamp-it-Once fixture is much easier to set-up both the main block and the work piece are lying down fully supported while setting up until it is clamped and secure.