Feature: Seals heater hose etc. From 1/2" to 3/4" diameter. Great for brake and fuel lines. Radiator hose clamp. Special-radius jaws will not damage internal hose linings lightweight. Non-conductive bright color-easy to find. Unique designed jaws prevent internal hose linings from destruction. Lightweight easy for handle and non-conductive safety. Professional Quality suits Mechanic, Workshop, Handy Man. Easy to Use. .