Dive Labs Lobster/Stone Crab Gauge

Measure once, keep your catch legal. The Dive Labs Lobster/Stone Crab Gauge is the thick aluminum caliper style required by Florida Fish and Wildlife — one side measures lobster at 3", the other stone crab at 2-7/8", so a single tool covers both seasons. An eyelet lets you clip it to a lanyard or retractor so it's always on hand when you find a keeper. Don't hit the water without one.

Pairs well with: a lobster snare, tickle stick, and catch bag.