Clean up your engine bay. Won't chew up rubber like worm clamps. Sold in packs of 2 Most applications need 2 or 4. Adjustable from 37mm to 42mm Made of Stainless Steel Are you tired of the old school pressure clamps you have on your radiator hoses? Replace old work pressure or worm type clamps. These new T-bolt clamps are fully adjustable and work in a variety of applications.