Sadhu Nail Board, 100 % Hand made with not a single sharp edge, everithing is gently sanded and preapared for long and confortable using made from real expensive russian birch plywood with High Rated Galvanised Nails, not painted or simple galvanised, it is big difference and after copper , it is the best choice.Boards are designed to lock between when closed and will not  fall or move during transportation or storage.Please check pictures as they are part of description. For any question don't hesitate to text me.Can do and personalised boards aswell with personalised text or engraved image.10mm between nails