Ladner Traps Zinc Anode for Crab Trap Solid zinc anode for reducing stainless steel crab trap corrosion from seawater Comes with bolt fitting drilled into the bottom of the unit that fits standard thread 1/2" bolts For use with Ladner stainless steel crab trap or any other crab trap with 1/2" bolt fitting Rectangular shape measuring 2-3/4" x 2-3/4" x 1-3/8" thick Expertly constructed in Canada