Steering coupler drift pin question

Part of description (This assortment of roll pins is suitable for a variety of jobs, including automotive, industrial and household tasks. With a heat treated spring steel construction for durability, these roll pins are designed for a long service life. )
Picked up and took one and put in vice and smashed it quite a bit. Very strong piece. Hardened steel very thick. Just don't see it breaking. When I find my other (new) kit I can replace it.