FEATURES: Double (one on each side) flag mount holes with pre-molded stops for all-purpose flagging situations. Enlarged arch carry handle allows gloved workers easy, comfortable and secure grip. Ribbed dome top for increased target value and superior structural strength. High gravity molded rubber base hugs the road as if it were "glued down." Recessed reflective band tiers, maximum width 6". Accommodates USA MUTCD 2" maximum spacing specifications. Two pre-molded light mounts are designed for standard size bolt and cup washers. Rounded dome top discourages any dangerous debris or rocks to collect on top of drum. Tested and certified to meet the crashworthy requirements of NCHRP-350.