Bests & Worsts Reviews from Amazon

These retractable casters were installed on my metal working workbench. By design they work independently which severely racked the loaded bench, as a single caster, on one leg, was lifting one complere side of the bench. This show stopping problem was solved by fabricating and installing a pair of foot treadles which span a pair of the caster levers. Once paired the casters work as a set. This and a liberal application of grease on the cam mechanism, resolved the racking problem. Now they work so well Tha I've purchased a second set for my woodworking bench! See the photos, they're worth a thousand words.