Clamps which have slits in the strap engage the rubber as soon as the clamp begins to tighten. The clamp won't slip around the hose which limits the tightness. Further tightening just damages the hose.
Our clamps are made with the "gear" formed on the outside of the strap. This leaves a smooth surface on the inside of the clamp. The smooth surface allows the strap to slip around the hose during tightening, creating a tighter grip on the through hull fitting. They are excellent for use on the exhaust system and stuffing box of inboard engine equipped boats as well as the keel cable hoses on the Catalina 22 and Catalina 25. All of these use 1-5/8" ID hose.
Will not fit the 2" and larger hose used on the
shaft log of the late model Catalina 28 and Florida built boats like the Catalina 350. Larger boats that use a 1-1/4" or 1-1/2" prop shaft like the Catalina 387, Catalina 42 or Catalina 470 also require larger hose clamps.
