A simple gauge for measuring wheelchair tubing so you order the right mounting hardware the first time. Clamps and shims are sized to the tube they grip, and a clamp that is one size out either will not close or will spin under load.
For a clinician assessing in a home or a school, the gauge means you can note the frame size during the visit, not go back with a tape measure or guessing from a photo. For a service technician, it saves a second trip.
It is a small thing that quietly removes most of the returns and delays from a positioning hardware order.
