Open from 3mm to 42mm (CAN NOT clamp on chair) Clamp on Square shaped wood Made of aluminum, plastic and metal Attaches to desks, carts, benches, worktables, posts, etc. Provides 1/4"-20 thread holes and one 3/8"-16 thread hole.
UltraClamp Assembly for Cameras
Net Weight: 136.8g
Thread Hole: 1/4"-20 & 3/8"-16 Minimum opening diameter :3mm Maximum opening diameter: 42mm
Package Included: 1 piece Ultra C-Clamp