Arkon RM0861420 Robust Mount Series Heavy Duty C-Clamp Camera Mount (sku 31819)The Arkon RM0861420 Heavy Duty C Clamp Camera Mount is a part of the Arkon Robust Mount Series which means it is a solid, sturdy and reliable mounting option. Robust Series mount delivers exceptional quality and performance Features industry standard 1 4" 20 camera bolt (screw) pattern Attaches easily to desks, carts, benches, worktables, posts, etc. C clamp jaws expand from 0. 25" to 2. 25" wide Compatible with Nikon, Sony, Samsung, Canon, Fujifilm,