Ratchet Cinch Pex/Hose Clamp Fastening Tool 1. Apply to F1807 and F2159 Pex fittings from 3/8 to 1 2. Apply to AMTS 2098 Ear Type SS Clamps 3. Apply to Oetiker Style SS Single Ear Stepless Clamps. 4, Ratchet design makes jobs done easily. 5. Do not apply to copper crimp fittings or ZurnPex quick clamps