Nauticalia founder chairman Lynn Lewis started out selling maritime antiques from a converted rubbish barge on the Thames. He invented the prototype Sea-Searcher to retrieve some tools he dropped whilst working on the hull - and thought other people might need something similar. Now, over 30 years and half a million magnets later, police, navies, rescue forces and pleasure boaters worldwide use (and are grateful for) theirs every day. The side plates channel the power so that in perfect contact it has a capacity of up to 140-lb, yet is compass safe at six feet. Buy now - one day it will save your keys, favourite tools or even that old Seagull outboard motor. Measures 4 x 3¼ x 1¼".