The 5 Prong Mechanical Keys have five sizes each for winding mechanical movements. Key sizes for the odd size key: 3 is 3/32", 5 is 1/8", 7 is 5/32", 9 is 11/64" and 11 is 3/16". Key sizes for the even size key: 2 is 2/32", 4 is 1/8", 6 is 5/32", 8 is 10/64", 10 is 11/64" and 12 is 1/5".

13546	13547	13548
2 = 3/32"	3 = 3/32"	4 = 1/8"
4 = 1/8"	5 = 1/8"	6 = 5/32"
6 = 5/32"	7 = 5/32"	8 = 10/64"
8 = 10/64"	9 = 11/64"	10 = 11/64"
10 = 11/64"	11 = 3/16"	12 = 1/5"