KNIPEX Cobra®...matic All features of the KNIPEX Cobra® 87 01 250. Automatic adjustment at the touch of a button directly on the workpiece. The sheltered positioned spring ensures that the pliers close automatically once the push-button is activated (one-hand operation!). - Adjustment positions: 25- Capacities for pipes (diameter): Ø 2 in- Capacities for pipes (diameter): Ø 50mm- Capacities for nuts: 46mm