In a combination of shoe cleat and holder, a screw-threaded spigot (12) on the cleat is inserted with rotation into a complementary socket (18) of the holder, and has a ring of free-standing posts (34, 42) extending axially from the cleat and a ring of radially-projective teeth (26) on the holder, the...http://www.google.es/patents/US5974700?utm_source=gb-gplus-sharePatente US5974700 - Shoe cleats
