Metal Fastening on Some Shoes
Puzzle 1 of Soft Things Piece of Cake Pack
Question is: Metal Fastening on Some Shoes
and the answer is: BUCKLE
Word Meaning:
BUCKLE — A metal clasp with a hinged tongue or a spike through which a belt or strap is passed and penetrated by the tongue or spike, in order to fasten the ends of the belt together or to secure the strap to something else.
Definitions from Wiktionary.