to quickly measure angle with right angle mold like A clamp and quick clamp. Durable: Our positioning squares are made of thick and high hardness plastic which makes them more durable, compact and portable. Clear scale: our positioning squares have a clear scale to help you easily measure and fix for mold making. Widely used: you can quickly make photo frames, cabinets, boxes through right angle; it is widely used for wood, metal right angle and 90 degree welding. Size --- very convenient L-shaped, 10cm (10 x 10cm). Product Description Color:Set of 4. The 90 positioning square is the best choice for woodworkers and woodworking enthusiasts; clear scale, multi-angle measurement, hard and drop-resistant material makes it convenient for quick measurement and positioning. 1. Our square can keep a perfect angle for making square moulds. 2. Thick plastic material, high hardness and drop resistant which makes it more durable, compact and portable. 3. 90 degree positioning bracket comes in handy in many applications, such as picture frames, cabinets, drawers, boxes, and fixtures. Features: It can accurately hold 90 degrees, and the clamp of which can quickly read data and facilitate angle measurement. Small size, light weight and sufficient quantity for long-term use, is the best tool to measure. Features: Material: engineering plastic. Dimensions: 10 x 10 cm. Contents: 4 right angle positioning rulers