The ornamental design for metal clasp for leather bracelets, as shown and described.
FIG. 1 is a top perspective view of the metal clasp for leather bracelets embracing a dual leather strap and an attached thumb screw, showing my new design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a front elevation view thereof;
FIG. 6 is a side elevation view thereof; and,
FIGS. 7, 8 and 9 show the metal clasp for leather bracelets with different jewelry stones glued to the thumbscrew.
Subject matter illustrated in dashed lines is shown for illustrative purposes only and does not form part of the claim.