Essential tool for plumbers, gas fitters and construction applications.? Adjustable serrated locking jaw design enables a firm grip when extra force is applied? Ideal for use on threaded pipes, irregular tubes and fasteners where additional strength is required? Knurled nut for easy one hand adjustment? Available in five different sizes from 250mm to 900mm? 40% lighter than traditional cast iron pipe wrenches for greater portability? Heavy duty aluminium body with heat treated drop forged jaws for strength and durability