a clamping and locating fixture includes a hollow body , a pin or angled plate mountable to the body , a locking arm positionable within the body locatable between two positions and a drive pin moveable within the body to engage the locking arm . a workpiece can be directed to a clamping position by the guide pin or angled plate . the pin or plate includes an aperture allowing a locking projection of the locking arm to extend therethrough and over a workpiece to clamp the workpiece for a processing operation . the locking projection can be retracted through the aperture while the workpiece is being located or is being removed . the drive pin can be moved within the body to engage a cam follower of the locking arm .