to cover the outer end 18 and caster socket 20 of each pair of straps 16 to provide protection from abrasions and also to enhance the appearance of the chair base as can be seen in fig5 a finger 46 extends downwardly from the inside top of the caster socket cover 44 into the smaller hole 23 of the caster socket 20 a screw 48 inserted through hole 23 from the bottom and into the finger 46 secures the cover 44 in place covers 44 may be of any shape consistent with the overall appearance of the chair so long as each adequately covers the socket block 20 for example the exterior of the cover may continue the lines of the straps 16 all decorative and protective plastic parts 30 34 44 may be colored to provide a pleasing and attractive appearance which will complement any chair seat mounted to the base and may be easily formed using conventional injection molding techniques once all weldments 17 in the base are completed a suitable protective coating 50 is applied to all parts as shown in fig6 preferably the base is heated to a temperature of 300 to 400 degrees by a radiant hot air convection oven and then dipped into a vat of plastisol plastisol typically comprises polyvinyl chloride and may be colored and textured to match the injection molded plastic parts using conventional.