Sears offers the Gladiator GearTrack End Caps 4-Pack, model no. GAACGE4PPM, for $4.89 with free shipping. (Amazon offers it for the same price as an add-on item.) That's a buck below our mention from three weeks ago and the lowest shipped price we could find by $6. The end caps snap on to your Gladiator wall system, eliminating sharp edges and preventing the clip-in hooks from sliding out.