The Knipex Cobra® Water Pump Pliers Set includes three pieces with sizes of 7", 10", and 12". These heavy-duty pliers are made of chrome-vanadium steel and are self-locking for secure use. The adjustable design allows for precise water pump maintenance, and they come with a lifetime manufacturer warranty. Made in Germany by the renowned brand KNIPEX, these water pump pliers are a reliable tool set for any home or workshop.