Marine Ball Lock Pins are similar to our standard single-acting Ball Lock Pins, except they are available only in stainless steel, and even have their handle made of stainless steel (instead of aluminum) for extra strength and corrosion resistance. Ball Lock Pins are high-strength, quick-release alignment pins with a precision ground shank. They are positive locking until released by pushing the button, which moves the center spindle forward to allow the balls to retract.