This photo variable friction arm is both clever and versatile - thanks to its interchangeable 1/4'' Attachments and a 3/8'' Adapter. It is also strong and easy to use - designed to complement a full range of adapters. Which means that you will be able to mix and match and always get the exact kit and setup you need on the day. Even more, it gives you the peace of mind you need to focus on the job at hand.