Square block (as per GB7-62) is an important auxiliary tool in the plate measurement. It is used for inspecting and measuring the tridimensional lineation by fitters, the parallelism and verticality of machining parts, as well as various location differences.

Cast lron square block Size:(mm) 1003--5003	Magnetic square block Size:(mm) 1003--5003	Magnetic square block Size:(mm) 1003--5003
Cast iron square tube	Square block	Square block
Square tube	Square tube	Square tube