- Lightweight folding straight edge with a 12.5mm block at each end for use with a metric graduated wedge (supplied separately).
- Folded length: 1m
- Extended length: 3m
- Strong joints with clamp mechanism
- Securing strap to hold in place when folded
- When used with the metric graduated wedge you can measure any vertical irregularity within a range of 12.5mm low to 12.5mm high.