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, red anodized, light alloy. Swiss made. ROHS and REACH compliant. Overall Height(mm) 185 Radius of Movement(mm) 130 Microfine Adjustment hole diameter: 3/8" Dial Gauge and base are NOT included. Still need an Indicator? Check out our selection here. Dimensions (mm) [see 2nd picture]: L=130 L1=70 D1=9 L2=60 D2=8 Threads [see 2nd picture]: M1=M6 (not fully shown in main picture) M2=M6 The Fisso Strato XS-13 F 3/4" Articulated Indicator Gauge Holder Arm is a great choice for fast, easy & accurate measurements. After you add your gauge, attach it to a machine or base operation is simple. Just put it into position, turn the knob, & you're ready to start measuring. Still have questions? You can contact us, or take a look at the Fisso Resource Center.