The Westcott Quick Mount S-Bracket is a secure mounting system for compact lights and modifiers with no unwanted stress on your light. It maximizes the flash with Bowens S-Type and umbrella-based modifiers and is adjustable with an Arca-type mounting plate for precise light placement and maximum output. It's vertical adjustment knob allows for precise vertical placement of the light head within the light head opening. Tension screw securely locks umbrella modifiers in place Mount compact lights equipped with a 1/4”-20 female thread Includes 3 cold shoe mounts around the perimeter for pairing speedlights with umbrella-based modifiers Solid metal and high-impact composite construction ensures stability and reliability The versatile quick-mount plate can remain attached to your light for future mounting Built-in tilter bracket with 5/8" receiver adjusts up to 180-degrees for precise light placement Compatible with lights up to 3.5" diameter and modifiers up to 4.5 lbs.