The wood plate is a dedicated plate for skin-friendly crimp training. Made from high-strength walnut wood, the edges are rounded and tapered. This taper reduces stress 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. Especially the 6mm is a high load. Set Contents: Width 11.7cm x Height 4.3cm A set of 2 each of 4mm and 6mm thick plates. Includes dedicated wood screws (3.5 x 25mm) We also sell a lower strength 15mm/12mm set. Notes: Do not use mounting screws with a shaft of 4.0mm or more. There is a risk of the plate cracking under load. Use the included wood screws (3.5 x 25mm) or 3.8mm course thread screws (25mm or longer) for installation. Tighten the final turn by hand. The product uses natural wood, so there may be slight variations in width and height. Custom sizes are also popular (1500 yen and up for a set of 2). Thickness can be made in 1mm increments from 3mm to 15mm. 15mm or more is also possible. Example: Thickness 7mm, 4mm, etc. Size changes, width 9.0cm x height 3.5cm, etc. Please inquire separately.