Important: Lead time on this item is currently about 3 weeks. Please contact us for the most accurate info. Features: Easy, fast & accurate positioning. One knob allows for simultaneous tightening / releasing of all 3 joints. Uses a maintenance-free, mechanical central tightening system. Quick, stepless lock. High-quality chrome plated alloy. Swiss made. ROHS and REACH compliant. Indicator holder and base is not included. This listing is for 1 arm. Still need an Indicator? Check out our selection here. Dimensions (mm) [see 2nd picture]: L=288 L1=161 D1=12 L2=127 D2=10 Threads [see 2nd picture]: M1=M8 M2=M8 The Fisso Classic 3300-28 Chrome Articulated Indicator Holder Arm with M8 top is affordable, accurate, and easy to use. After you attach it to a machine or base and add the adjustment / gauge holder operation is simple. All you need to do is position it, turn the knob & you're good to go. Still have questions? You can contact us, or take a look at the Fisso Resource Center.