Adding some weight to your WCP320 polymer grip module can enhance your recoil control and improve the balance and handling of your handgun. These solid tungsten slide-in weights are non-magnetic, corrosion resistant and have a drop-in fit to your Wilson Combat WCP320 grip module or factory SIG SAUER X-Compact grips. Features: Three solid tungsten rod weights for WCP320 module that total 42g/1.5 ounces Drop-in fit compatible with Wilson Combat WCP320, WCP365 or SIG SAUER 320 X-Compact grip module NOTE- Because these weights are a drop-in fit, apply a dab of heavy grease to prevent any potential rattle with some frames. For a more permanent installation, silicone caulk adhesive is a great choice.