The engineering purpose behind Hooker's newest band clamps is to provide ease of use while creating a tight seal that avoids exhaust leaks which plague many other less quality clamping devices. Designed for slip fit exhaust, the clamp clenches down on the outside tubing and creates a solid leak-free connection. Made from high grade stainless steel and offered in either 2.5 in. or 3 in. diameter sizes, these clamps can be purchased in packages of two or 10.