The knipex 88 01 series alligator waterpump pliers with dipped pvc handles and a box joint design prevents slipping from the work piece the gripping surfaces have special hardened teeth to approx 61 hrc offering high wear resistance and stable gripping they are made from chrome vanadium electric steel that has been oil hardened they offer more output and comfort compared to conventional water pump pliers of the same length and have a 9 notch adjustment positioning for 30 more gripping capacity