The P300 Sailors Tool is a knife, spike and pliers all in one. The handle is made with aluminum and the frame is stainless steel for years of use in the harsh marine environment. For safety, the blade and spike lock in place -- the double lock will secure the blade, the spike or both at the same time. The blade, spike and pliers are made with 440C stainless (famous for itís high corrosion resistance, wear resistance, strength and hardness qualities). Designed for one hand opening.