Standard with Scouts, Colleges, and Mother and father. Please Learn Description. Holds are roughly the dimensions of a baseball. The diameter of the opening in these holds is 1/4″ Holds require use of #10 Wooden Screws, not less than 2 inches lengthy. These holds are meant for use with wooden that’s 1 half of inches thick. (Please take a look at our “bolt on” holds for plywood 3/4s- 1″ thick ) PLEASE NOTE: {Hardware} isn’t included in our screw on units. We make our climbing holds from recycled supplies. What are they fabricated from? Recycled supplies together with polyurethane, Vinyl Ester, Polyester, Plastics, Epoxy, Vegetable oil and different natural supplies. Our supplies are non-toxic. We make them in the USA, they’re shipped from our store on to you. The bonding supplies that we use could create a odor with the holds. To eliminate the odor please soak in heat water. These holds are NONTOXIC. Our holds are very robust and can stand as much as any local weather, scorching or chilly. Holds are available in over 200 completely different distinctive shapes. In the event you want something in any respect please don’t hesitate to contact us. We’re VERY aware of messages by means of Amazon, and can fortunately provide help to with any concern. E mail us on Amazon or name Rocky Mountain Climbing Gear (208) 704-0291 We Use USPS Solely These holds include a lifetime assure. Return coverage is 60 day. Rocky Mountain Climbing Gear is a trademarked firm. In the event you want to resell our merchandise please contact us first, please don’t re use our pictures or textual content.