This Professional Worm Gear Clamps Kit is perfect for working professionals such as contractors, installers, mechanics, plumbers, and more. The kit contains an assortment of 195 American-style (slotted) all-stainless worm gear clamps in the most popular sizes. Clamp ranges are from 10-16mm through 59-83mm, and a handy "flex driver" installation tool is included in a durable plastic case. Kit - Professional Worm Gear Clamp Assortment with Flexi Driver Tool