The small size of the corner clamps allows for quick and easy use. The spring mechanism can be easily adjusted to the desired height. All this makes the work much easier. Observing precise parameters is also a great advantage. If you use the clamps shown below you can be sure that each of them will bond the material at a perfect 90 degree angle. The durability of the clamps is due to the use of hard plastic. The spring is made of properly processed steel. The whole thing is lightweight and resistant to mechanical damage. All this means you have to do it with a very durable tool. Technical data: 90 angle tensioner set, 4 pieces, plastic angle clamps: 90, height: 75 mm, press edge length: 40 mm, clamping range 5-22 mm