Important: Lead time on this item is currently about 3 weeks. Please contact us for the most accurate info. Features: Easy, fast & accurate positioning. Precise microfine adjustment with dovetail and mounting hole. 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. Overall Height(mm): 185 Radius of Movement(mm): 130 Microfine Adjustment hole diameter: 3/8" Dial Gauge is NOT included. Still need an Indicator? Check out our selection here. Arm Dimensions (mm) [see 2nd picture]: L=130 L1=71 D1=9 L2=59 D2=8 Threads [see 2nd picture]: M1=M6 M2=M6 Need a base for your Fisso arm? You can find them here. The Fisso Classic 1100-13 F 3/8" Articulated Indicator Holder Arm is an affordable & accurate option. It's great for measuring tasks required by a wide variety of machining jobs. It includes the adjustment (indicator holder) so you'll need to get a base separate, or screw the arm into your machine or work surface. Using your Fisso articulating arm is simple. Attach your favorite dial indicator to the adjustment, position it, twist the knob, and you're ready to start measuring. Still have questions? You can contact us, or take a look at the Fisso Resource Center.