Abstract: A variable contour vice jaw. A vice (10) having variable contour vice jaws (12, 14) is disclosed for clamping of irregularly shaped objects. Housing (26, 126) receives piston (50, 150) which is truncated (58, 158) and has a jaw contact member (64, 163) removably affixed thereto. Plate (44, 144) is affixed to housing (26, 126) and prevents piston (50) from being removed from housing. Bore (28, 128) is filled with an incompressible fluid with pistons (50, 150) half extended. Jaw contact member (64, 163) move in and out to conform to the shape of an irregularly shaped member held within vice jaws (12, 14).