These sturdy knobs allow our SJ-1 Spider Joints to be quickly adjusted without the use of tools. The "T" shape is easy to grip and turn even in tight areas. Great for projects that need to be repositioned frequently.
These knobs are constructed of rigid plastic, and feature a 3/4" deep threaded steel insert with 1/4 x 20 threads. They have a width of approximately 1 1/16" and increase the height of our joints 3/4".