Thestrongclampismadeofhigh-qualityplastic,andthebracketlinkrodismadeofaluminumalloy,whichisdurable; Modulardesign,easytoinstallanddisassemble; Thedouble-headedclampsupportshandlebars,crossbars,selfiesticks,etcwithadiameterof5-4cm; Theuniversalballheaddesignofthebracketcanrotate360degreesandadjustvariousangles;