Great for picture frames and more. Secure 90 degree Tee and corner joints quickly and securely with this precision-cast, twin-screw miter clamp. To make clamping even easier, this unique clamp also features a clever push-button system that allows you to adjust the clamp heads without time-consuming screwing or unscrewing. Large 2-3/8" jaw capacity. Dependable Acme screw movement.