
Special size bracket. The first 7mm with a thread of 10Mx1.5 From the bottom it's only about 3 turns, apparently 8M x 1.25. The bottom three threads will also work with 5/16"-18 bold, but only with about 1 1/2 turns.

Versatile and Durable: Discover the AmazonBasics 14 Piece Nylon Spring Clamp Set
12 Review

WETOLS Angle Clamp 2Pcs Woodworking: Precision Tool for Perfect Angles in Woodworking Projects
11 Review

DM-202
14 Review

Enhance Your Woodworking Experience π§ with Wellmax Spring Clamps Woodworking Backdrops
11 Review