Escape Climbing 2" Stainless Steel Bolts (25 Pack) - Durable Rock Climbing Hardware for Gym & Outdoor Use

None of my 5/16" hex keys fit these bolts. I tried half a dozen and none of them fit. These bolts also wiggle a little on the wall before being clamped down. I bought the black (rated for indoor only) bolts from Climbing Tech (Easier to use than hex bolts, holding up to weather, the more professional choice.Man, these bolts do an amazing job of holding things onto other things. Specifically holds on a wall. 5/5!Bought these to bolt some climbing holds into 5/4 (1-1/4") material in an outdoor application. Worked great and have not shown any corrosion. Price is really good considering how expensive these can be at your local hardware store or big box Lowe's or Home Depot (if they even have them). I am extremely happy with my purchase and would recommend them to anyone looking to build a climbing wall in an outdoor space.It does exactly what it needs to do.The 2" Steel Escape Climbing Bolts we received were as advertised and met our expectations. We don't like surprises here at the ranch so we will definitely consider purchasing these bolts again as needed.excellent product, perfect for a outdoor-under roof wall in a tropical countryGreat