The Grave Key. The 6 inch by 1.5 to 3.25 inch by 3/4 inch wood coffin-shaped tray was painted with black acrylic paint. It features assorted glass beads, die cut wood key stained with black acrylic ink, Onyx gemstones, and a black resin rose. The finished box was sealed with a gloss acrylic sealant. There is a metal hanger on the back so it can be hung on a wall.