10 large bolt on Rock climbing holds with hardware. Please note these are the bolt on variety. They are meant to be used with 3/4 plywood. They are not meant for 2x4's or 2x6's, for those projects please refer to our "screw on" climbing holds. Please read description and shipping times. Holds are about the size of a baseball. Holds come in over 200 different unique shapes. Holds come with 2" bolts and 3/8 t-nuts. To avoid damage to your wall we recommend furring your plywood from the walls. Drill a 7/16th hole when installing the t-nuts. Do not Hammer the T nuts in. Rocky mountain climbing holds are made from recycled materials. We keep plastics out of land fills! what are they made of recycled materials including polyurethane, vinyl ester, polyester, plastics, epoxy, Vegetable oil and other organic materials. Our materials are non-toxic. Rocky mountain climbing holds are 100% American made. They are shipped from our shop directly to you. The materials that we use may create a smell with the holds. To get rid of the smell please soak in warm water. These holds are nontoxic. Rocky mountain cling holds are very strong and will stand up to any climate, hot or cold. .