Calf Eze Utilizes A Non-Slip Cam Traction System That Is Easy To Clean. Jack Release Mechanism Allows The User To Easily Position The Jack On The Rods And Lock It In Place. Steel Cams Prevent Slipping 3Rd Hook Provided Giving A Single Pull Option. Calf Eze Is A Fetal Extractor Engineered For The User That Prefers A Dual Action Pull Or Zigzag Motion Instead Of A Single Pull Instrument. Special Strength Aluminum