The Metolius Modular 40 Hold Mega Pack is a climbing wall in a box just add plywood! Take the mystery out of buying climbing holds with Metolius Mega Packs. Each set includes a mix of varying shapes and sizes, all required hardware, 'How to Build' instructions, and a Metolius Multi Wrench. So order now and start training! With more and more people realizing the potential for indoor climbing, Metolius introduces the modular hold system. These random aesthetic patterns make these holds an excellent choice for slabs, vertical walls, and even ceilings. Ideal for building your own indoor wall. Mix and match to create your own personal gym. Best if mounted on 34 in. plywood. Includes hardware, instructions and ideas for your artificial wall. Ideal starter set for home wall. Climbing wall in a box just add plywood. Includes 40 holds in varying shapes and sizes. All required hardware and Metolius Multi Wrench included. Strong, flexible Fusion Resin to resist breakage. Steel washers in all bolt on holds for increased strength and durability.