KS1 : small lobster clasp with 1 jump ring;
KS2 : small lobster clasp with 2 jump rings;
KM1 : medium lobster clasp with 1 jump ring;
KM2 : medium lobster clasp with 2 jump rings;
SS : thick cellphone strap with 1 jump ring;
DTS : thin cellphone strap with 1 jump ring and 1 mini bell.
Small lobster clasp is suitable for attachment to bracelet.
Medium lobster clasp is suitable for attachment to pet collar.