Despite its many drawbacks, one of the most common means of retaining caster stems into application sockets for years has been the grip or friction ring." With patents pending, Talma Fastener exclusively manufactures and offers the Friction Sleeve - a collapsible composite sheath affixed over a hardened, cold formed caster stem that offers significantly better support, security, noise reduction, accommodation of socket size variance, corrosion resistance, ease of insertion/removal and, just as important, cost.