Designed for use with the iGaging 300mm Flat Rule, it upgrades your standard rule to something with better precision so it can be used as a depth gauge for checking or making repeatable marks.
It will also work with any other rule that 24.0 - 25.0mm wide. It is locked in place by the small knurled knob. Wholly made from durable and long-lasting anodised aluminium. Please note: colour may vary from that shown.