Daystars new polyurethane Hi Lift jack isolator secures the handle on your Hi-Lift jack when the jack is not in use, and makes transporting your Hi-Lift jack much quieter and easier. These 1 in. thick cast polyurethane blocks fit perfect and simply slide over the jack handle and the jacks I-beam to keep them secured together while traveling down those bumpy roads. No more rattling or lost jack handles! Daystar isolators fit all Hi-Lift brand jacks.