Razor hlau, feem ntau hu ua barbed hlau, yog ib tug niaj hnub version thiab ib tug zoo heev lwm txoj rau cov tsoos barbed hlau tsim los tiv thaiv tsis tau tso cai nkag mus rau perimeter teeb meem.Nws yog tsim los ntawm high-strength hlau uas muaj coob tus ntse barbs yog tsim nyob ze, tusyees-spaced intervals.Nws cov barbs ntse ua raws li ob qho tib si kev pom thiab kev puas siab puas ntsws, ua rau nws zoo tagnrho rau kev lag luam xws li kev lag luam, kev lag luam, thaj chaw, thiab tsoomfwv.