Black Agate Stone Keyhole Weights (0 gauge - 5/8 inch)ONE PAIR of Black Agate Stone Keyhole Weights. These are each hand made and have been polished to a smooth finish. 0 gauge 1 2 inch are about 1 & 1 2 inch from top to bottom. Each weighs about . 3 . 7 ounces. 9 16 & 5 8 inch are are about 2 & 1 2 inch from top to bottom and side to side. Each weighs about 1. 0 1. 5 ounces. Additional Info: Stone items are all hand made so they may slightly vary in size, color, and shape. All of our stones are