Shelf clips are a necessary addition to your shelf brackets especially when used with glass shelving. Simply pop 2 of the #8160 Rubber Cushions into the #8162 plastic shelf clip. Put two on each shelf bracket. It will keep your glass from sliding and scratching on the metal brackets. To order properly, for every plastic shelf clip you will need two rubber cushions and for every shelf bracket you will need two plastic shelf clips. Your order per bracket will be: 2 - #8162 and 4 - #8160