They fit perfectly on the small foot of my 2.5 ton compact jack. The internal diameter of the Jack saddle shell is 42mm or just over 1-5/8", and these spacers measure 40mm on the smaller diameter end which slides into the saddle for a very secure fit. The depth of the liner ensures that the saddle shell securely supports the jack pad after the load is applied.I'm giving four stars instead of five because only one pad has the preferred anti-slip hatching on the top, the other is DEDC branded, it would be better if both strips would come with an anti-slip hatch pattern.They also smell awful but since they are kept in a case in the garage that's not a problem for me.For around $12 they seem like a pretty good deal.
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