Material: zinc alloy<br style="font-family: verdana, arial, helvetica, sans-serif; font-size: small; line-height: normal;">Weight:72g<br style="font-family: verdana, arial, helvetica, sans-serif; font-size: small; line-height: normal;">Hole diameter:2.4cmuff080.9inuff09<br style="font-family: verdana, arial, helvetica, sans-serif; font-size: small; line-height: normal;">Size:11.6cm*6.7cm*0.7cmuff084.5in*2.6in*0.27inuff09<br style="font-family: verdana, arial, helvetica, sans-serif; font-size: small; line-height: normal;">Features:<br style="font-family: verdana, arial, helvetica, sans-serif; font-size: small; line-height: normal;">Simple structure,Small volume, less weight,suit for women, aportable self-defense tool.&nbsp;<br style="font-family: verdana, arial, helvetica, sans-serif; font-size: small; line-height: normal;">Can use jewelry accessories and be self-defense equipmentemergency