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) 210 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=70 D1=9 L2=60 D2=8 Threads [see 2nd picture]: M1=M6 M2=M6 Info on Base: Holding Power (N): 150 Dimensions (mm): Ø 30 x 25 Thread: M6 If you're looking for quick, easy, and reliable measurements you should consider the Fisso Strato XS-13 F TMS 3/8" Articulated Indicator Gauge Holder Arm + Pot Magnet. It includes both a base and the indicator holder so you wont need to go fishing around for extra attachments. Operating your Fisso articulating arm is simple; after you've added your favorite dial indicator just get it into place, twist the handle and you're ready to start measuring. Still have questions? You can contact us, or take a look at the Fisso Resource Center.