This BlueSpot Tools Bricklaying Profile Clamp has the following specification:
Size: 300mm (12in)
Max. Opening: 300mm
Min. Opening: 240mm
Long Thread Length: 80mm
The BlueSpot Bricklaying Profile Clamp is manufactured from carbon steel for increased durability. Ideal for securing objects together to prevent movement or separation, resulting in an accurate guide to building the wall straight and constructing the corner of a brick surface. Complete with a T-bolt thumbscrew.