Designed to crimp single-ear clamps, these Jonard Tools ECP-100 Single-Ear Hose Clamp Straight Jaw Pliers are perfect for crimping single-ear clamps. You can also use the pliers with clamps on CV boots, cooler and fuel lines, air pressure systems, and compressors. These pliers prevent damage to press points on ear clamps, and the slim head allows access in tight spaces. Made from heat-treated high carbon steel for long life and durability.