Butterfly Keys - Chigiri ① This is a set of two chigiri (butterfly keys) used to prevent cracking in single boards, solid wood boards, and tabletops. Black Walnut Please embed them in the areas with cracks and then plane them down for finishing. As they are handmade, there may be slight variations in size, tool marks, and minor chips. This shouldn't be a problem as they will be planed down in the end. Please refrain from purchasing if you are looking for perfection. Thank you for your understanding. #BlackWalnut #ButterflyKeys #Chigiri #SingleBoard #Table