Abstract: A holder for clamping a flexible sheet material and the like, includes an extruded plastic, elongated channel member having a base wall having two ends. The base wall is connected at one of the ends to a relatively short, upstanding forward leg having an inner face forming a bearing surface. The forward leg has a free upper end, and the base wall is connected at the other of the ends thereof to a relatively long, upstanding rearward leg having an upper end, and a top wall joined to the upper end of the rearward leg. The top wall is movable between its initial, extruded position, in which it extends down from the rearward leg to a position below and outside the free end of the forward leg, and an operational position, in which the top wall is moved to a position lying inside the forward leg so that it biasely and resiliently engages the bearing surface of the inner face of the forward leg. A method for making the holder is also disclosed.