Moderate force is required; please take care of them and ensure that the weight tool posts stay securely in the weight post holes Material: The putter weight wrench is made of high quality aluminium alloy, and the screws are made of stainless steel, which are and portable Replace putter wrench tool only fit for Does not fit squareback, fastback and detour models Eight different screw weights are available Package Includes: 1 x wrench; 2 x Putter Weights, Weight: 0.0440924524 Pounds, Manufacturer: Yosoo