I'm selling a vintage 'Bird' lapper for skateboard trucks.  The Lapper makes a vintage skateboard setup even more complete.  It was intended to help prevent hangups with the back truck on copings / curbs.  These are old, and the plastic may be cracking on the edges in some cases.  As a result they cannot be guaranteed to take any impact, and may be best for display purposes on your vintage complete wall-hanger.  Thank you for your attention to this.