Tank traps are a fantastic way for match and event directors and shooters alike to put up a quick and easy barricade set. Tank traps offer a viable solution for realistic target engagements from alternative firing positions. (4A-4's Not Included) FeaturesStructural 4 x 4 steelBracket and mounting hardware onlyIncludes self-driving boltsNo wrench necessary for assemblyUses customer supplied 4a ^2 x 4a ^2 boards