The visegrip Irwin 7r straight jaw locking plier has the following specifications: length: 175mm (7 inch). Capacity: 38mm. The Irwin vise-grip straight jaw locking pliers feature a unique self-energising lower jaw that delivers three times more gripping power than traditional locking pliers, with absolutely no slipping or stripping. The slotted geometry of the new ‘self-energising’ vise-grip locking pliers exponentially increases torque for more secure clamping. The vise-grip cr pliers can establish multiple contact points, guaranteeing a significantly tighter grip. As a result, it is especially well-suited for performing in greasy work environments and for manoeuvring in tight spaces where a worker cannot easily get two hands on a tool.