Never get caught with an undersized crab again! Use the Shark Tooth Tackle SA Crab Gauge Measurer to check the size of your catch every time (and always have a bottle opener handy).
These measurers are made from 3mm 316 Stainless Steel and are almost indestructible (and salt proof!). With the built in bottle opener and a pre-drilled hole for easy attachment options, you should never leave home without it!