The Murray/ Spiny crayfish Gauge is made from a robust 3mm stainless steel. It is suitable for measuring carapace size of both species and also comes in handy for opening stubbles. A great addition to the camping and fishing kit. 

Hand made in WA 

Laser cut and laser engraved.

Guaranteed to last a lifetime as long as you don’t drop it in the river. Yep it’s also guaranteed not to float.