The HFS(R) Dial Test Indicator Holder is the perfect tool for Bridgeport mill machines. Made of lightweight and durable aluminum alloy, it features a clamping diameter of 1-7/8" and reach diameter of 0-12". With a length of 4-1/2" from clamping bracket to indicator, this holder is designed with bearing pads spaced for rigidity and an opposite pressure screw for secure mounting. The holder mounts easily with a single pressure screw on the machine quill, bypassing the working tool. The required stiffness is adjustable and does not change with the rotation of the joint, making it easy to use. This holder is suitable for all indicators with a 5/32" shank and adapts immediately for positive and fast indicating. It's a must-have for anyone looking for a fast and accurate way to indicate on their Bridgeport mill machine.