When you have big features to brush or for cleaning up a first ascent, this large, boar's hair rock climbing brush is the ticket.
3/8-16 Zinc Round Base T-nuts
The T-nut to choose for commercial high use, steep walls, and roof sections.
For highly corrosive environments.
3/8-16 x 2" Indoor rated allen head bolt
An adult hand easily fits inside this handle bar ring.