This page is for a special product. This is a set of two pairs of 12mm & 15mm holds. Made from high-strength walnut wood, the edges are rounded with a beveled taper. This taper reduces stress on the skin and provides an excellent grip. Improved hold strength will dramatically increase your maximum grade. Train your fingers with these wooden holds and push your limits. Set Contents: Width 11.7cm x Height 4.3cm A set of 4 plates each of 15mm and 12mm thickness. Dedicated wood screws included (3.5 x 32mm) We also sell a stronger 9mm/6mm set. Important Notes: Do not use mounting screws with a shaft diameter of 4.0mm or more. This may cause the plate to crack under load. Use the included wood screws (3.5 x 32mm) or 3.8mm course thread screws (32mm 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 available (1500 yen per pair). Thicknesses from 3mm to 15mm are available in 1mm increments. Thicker than 15mm is also possible. Examples: 7mm, 4mm thickness, etc. Size changes, width 9.0cm x height 3.5cm, etc. Please inquire separately.