Upright piano lock kit is composed of 4 pieces: the lock, key, striker plate and escutcheon. The lock, plate and escutcheon are made of solid brass. Lock plate dimensions: 2-9/16" (length) x 13/32" (width). Striker Plate: 1-5/8" (length) x 13/32" (width). The distance from the top of the lock plate to the center of the key hole is 7/8".