Caster Wheel Socket for 1/2" Square Tubing

This is a replacement socket for a caster wheel that fits snugly in 1/2 inch square tubing. The part was made to replace worn out sockets on a Critter Nation small animal cage, but should fit any 1/2" square hole that is at least 1.5" deep.

The part is purposefully slightly wider than 1/2", this is because the spikes are meant to be squished as the part is inserted, so that friction makes it stay (just like the original, hence the eventual tear once pulled out, and the potential need for a re