Punch Lock Hose Clamp. Size indicates which hose the clamp can accommodate. Light-duty buckle-on clamps are installed using a clamping tool with an integrated conical punch. The buckle is secured by striking the punch with a hammer to lock it in place. These clamps are designed for hoses in non-pressurized applications and are not recommended for use with plastic fittings, which may be prone to cracking.
