Irwin groovelock water pump pliers with thin handles irwin 10507632 irwins 250mm groovelock pliers have been designed with twice the number of groove positions compared to traditional groove joint pliers this enables the pliers to give a superior grip by ensuring optimal hand and jaw positioning the specially engineered versatile jaws securely grip round hexagonal square and flat surfaces irwin 10507632 groovelock water pump pliers 10in 250mm