Robust adjustable arm with a jointed design and a switchable permanent base for flexible alignment tasks Suitable for machine fabrication, automotive , and home workshop projects, enabling detailed size measurement and calibration Provides precision measurement support for digital dial indicators, ensuring stability and accuracy of readings The adjustable base holder features easytooperate controls, delivering a secure grip on metal surfaces and improving workflow efficiency in the workshop Key attributes: robust construction, switchable permanent base, compatibility with digital dial indicators, stable performance for alignment and measurement tasks Use scenarios In a machine fabrication , use the base holder to align fixtures and take precise measurements with digital dial indicators In automotive , employ the holder to verify component alignment and calibrate equipment during service In a home workshop, perform accurate size measurements and calibration of metal parts and assemblies