The new PATENT PENDING Harmonic Target is the ultimate handgun training target. By combining the durability of a steel target, with the precision scoring of a paper target, this revolutionary design is ideal for competition and defensive handgun training. The overall size of the steel matches a standard IPSC / USPSA metric target with the "D" zone removed. The outer plate is laser cut from 3/8" thick AR500 steel and is ridged mounted to our 2x4 post sleeve. The inner plate is laser cut from 1/4" thick AR500 steel and includes integrated tuning forks that are concealed behind the front plate. The inner, Harmonic Plate, is mounted using industrial Mfg: Challenge Targets SPECS: Outer Target Plate: Metric = (30cm x 60cm) | Standard = (11.81" x 23.62") x 3/8" thick AR500 steel - unpainted. Inner Harmonic Plate : Metric = (15cm x 28cm) | Standard = (5.9"x11") x 1/4" thick AR500 steel - unpainted. Stake Construction: 1/4" thic