steel, in 2 parts

keys 78.3 x 25 x 6 cm (30 7/8 x 9 7/8 x 2 3/8 in.)
hook 7.5 x 17.9 x 11.2 cm (2 7/8 x 7 x 4 3/8 in.)
approximate overall 81 x 17.9 x 11.2 cm (31 7/8 x 7 x 4 3/8 in.)

Executed in 2007.