These holders come with a calibration certificate traceable to NIST states that the granite base has passed a test for surface accuracy. The extremely tight flatness tolerances of the granite allow for nearly frictionless workpiece movement and provide an accurate reference plane for inspection work.

A heavy cast iron base adds stability. These stands hold indicators in place for taking accurate readings.

Position the arm by adjusting joints at the top and middle.

For more versatility than other low-profile holders, this holder has six locations for mounting indicators and accessories, including two mounting holes and four places to mount an indicator lug back with the included thumb screws.

Adjust the flexible arm to nearly any position.

Adjust the flexible arm to nearly any position.

Vise-grip locking pliers clamp these holders to most thin, flat surfaces, and the flexible arm lets you position your indicator around obstructions.

Attach the C-clamp on this holder to your Bridgeport J head to take indicator measurements without obstructing the cutting tool.