Southco Inc 93-307 Push-Lock Push-to-Close Latch .500 Panel Thickness, Southco Slam Action Type Latches, Single hole mounting. Latches by simply pushing door closed. Housing is made from die cast zinc chrome plated. Knob style has plastic knob. Knob style and push lock can be operated without key when left in the unlocked position. Both the knob style and key activated style will unlatch with a 90degrees turn. Push lock is corrosion resistant and unlatches by just pushing the button.