4 Versions: Iconic WW2 vehicle barrier, the Czech Hedgehog. 1/8 scale model. Also included, in 1/8 scale, are files for a "BIG" version, plus the "Normandy" and "Atlantic", because life's a beach. Build three of each file, 3x legs and 3x gussets. From the comments: "ImpulsiveJames" recommends pre-assembling one gusset per to each leg first. Note: Careful which holes you choose, they should only be for that gusset to that leg only.Use a #2 center drill, or 2mm drill to size holes prior to assembly. Pin components with 4d finishing nails. Cut a hands length of 1.75mm filament. Using a flat tipped soldering iron, on medium heat, press the end of the filament into a rivet head. Several light presses work best. Head only one end! Thread the headed filament into the assembly until the head is well seated. Cut/trim leaving about 2mm filament exposed on the opposite side. Head the the opposite side. Repeat. Requires 30x rivets. The "Big" beach version has 60, and has 280mm long "legs".