Poison Needle Knuckles was one of the RM Draw prizes a few weeks ago. They are not available currently, BUT you can get the capsule of it by doing GM Draw. Iron Knuckles are currently not out yet. They will probably be available soon enough. I tried the accessory and I woudln't buy it if I were you. It pretty much makes you strong and takes away ALL of you speed and you fall down sometimes because it's heavy and you lose balance. Have fun!