plates 42 and 44 are sized such that when the clamping plates 42 and 44 are affixed to the movable door panel 12 the clamping plates have a combined interior width 46 see fig5 slightly in excess of that of the roller 26 to allow for free movement of the roller 26 within the inboard and outboard clamping plates 42 and 44 the combined interior width 46 comprises the thickness 40 of the movable door panel 12 and a relieved interior width 48 of each of the inboard and outboard roller clamping plates 42 and 44 see fig5 each of the roller clamping plates 42 and 44 also includes a blind bore 50 which is sized to receive the axle 38 of the roller 26 with reference to fig4 and 6 the roller clamping plates 42 and 44 are attached to the movable door 12 by means of fasteners 52 for each roller assembly 18 two fasteners 52 are used with one fastener 52 being positioned on each side of the roller 26 as illustrated in fig4 each fastener 52 passes through a through bore 54 in the inboard roller clamping plate 42 and is affixed to a blind bore 56 in the outboard roller clamping plate 44 each fastener 52 may be affixed.