Enviro Design Products presents the 2-inch and 4-inch grip N lock well cap. It has transformed the old Snap Cap into the new grip N lock, a hard-hitting cap built for the worst environments. Intended to be easy to install and cost efficient, this new cap does not require grouting, screwing or gluing; one blow with a rubber mallet secures the cap to the well. Another new feature includes a series of raised, sharp ridges inside the coupling to grip the casing. Composed of glass-filled nylon, the grip N lock is chemical-and temperature-resistant and comes in either bright orange or white. Enviro Design Products Inc.