Each number quantity represents how many bracket you would like. For Example: "Quantity: 1 = One Leg Bracket Quantity: 2 = Two Leg Brackets, And so on...
Metal Size: 1.5" Wide x 3/16" Thick & 3" Lip on top with 1/4 Drilled holes
Weight Limit: Varies in size you pick. But have been tested with 200+lbs .