The knob is firmly locked, and the clamp is locked clockwise, which is convenient to use, strong in clamping force and more . protective pad protects the clamped object, effectively protects the of the object from being pinched, and is considerate in design. There are clear scales inside and outside, which is convenient for measuring all workpiece angles. 90-degree right-angle fixing makes the right angle more accurate and reduces the offset. It is easier to operate, and 45-degree marking and corner cutting can easily fix the spliced picture frame. Fixable holes are arranged on the two inner sides of the clamp body, which makes the clamping more secure and can also be hung for storage., Weight: 1.27427187436 pounds, Manufacturer: Reeatel