The SEA-DOG LINE354-221972 SS SLAM LATCH 2 WATERPROOF is a 2-point latch designed for use with a 2" diameter door. It is made of stainless steel and features a water-resistant seal.
The SEA-DOG LINE354-221972L SS SLAM LATCH 2 WATRPRF LKNG is a two-point latch designed for use with a watertight door. It features a stainless steel body and a stainless steel spring.