The skid has holes allowing the wheels to still roll when used on hard surface like concrete. Quick release mount makes mounting and removal super easy. Front mount is a hook that captures the skid.
Rear has a Bolt on U that attaches to skid and slides into the bottom mount where a easy pull pin releases it. A second hole is there if you want to use a padlock to keep secure when not in use. The item "Aluminum Floor Jack Skid Plate and Quick Release Mount Combo" is in sale since Sunday, November 18, 2018. This item is in the category "eBay Motors\Automotive Tools & Supplies\Shop Equipment & Supplies\Jacks & Jack Stands". The seller is "go5012" and is located in Phoenix, Arizona.This item can be shipped to United States.