Special product, a 15mm & 9mm set. The wood plate is a plate exclusively for skin-friendly crimp training. Made of high-strength walnut wood, the edges are rounded and tapered. This taper reduces the burden on the skin and provides an exquisite grip. Improved holding power dramatically increases your limit grade. Train your fingers with the wood plate and push your limit grade higher. Especially the 6mm is high load. Set contents: Width 13.9cm x Height 4.2cm Comes with special wood screws (3.5 x 25mm) Notes: Do not use mounting screws with a shaft of 4.0mm or more. There is a risk that the plate will crack due to the load. Use the included wood screws (3.5 x 25mm) or 3.8mm course thread (length 25mm or more) for installation. Please tighten the last turn by hand. Since the product uses natural wood, there may be slight variations in width and height. Custom dimensions available (1500 yen per pair) Thickness can be made in 1mm increments from 3mm to 15mm. 15mm or more is also possible. Please inquire separately.