1[Universal Indicator Holder] This indicator holder is designed for mounting indicators with dovetail mounts, providing a versatile solution for various applications. 2[Swivel Joint] Equipped with a swivel joint with knurled clamping ring, this holder allows for easy adjustment of the indicator, ensuring precise measurements. 3[Easy Installation] This dovetail indicator holder can be effortlessly secured in a chuck or a height gauge, providing a stable and reliable platform for accurate testing. 4[Premium Material] Constructed from premium steel, this indicator arm is sturdy and strong, ensuring long lasting performance in demanding industrial environments. 5[Easy to Use] Simply adjust the holder to fit your dial gauge and secure it in place. The 8 x 70mm size ensures compatibility with most dial gauges.