Hex Dogging Key 1/8 inch 5/32 inch and 7/32 inch for Push Bar Panic Exit Device,Metal Dog Keys Kit 15-Piece, 3 Size

are these keys the standard length about 3 inch they look like the new shorter version that they now use on the end cap style push bars

Is the key chain hook included?

Would i receive 3 of each size? or do i get to choose what size of key i need? thanks

Do these type of keys fit old style push bars iam looking for a way to lock down my church from the inside in case of emergency