The Sled Tenom represents a puzzle construction (flat-pack) made of plywood units cut on a CNC router. All units are cut from one single panel and are assembled without any glue, screws, nails or anything else similar! For additional comfort and safety two handles stick out from both sides of the seat and the side panels are oblique. There are two stainless steel strips below fixed with screws.http://www.tenomfurniture.com/kids/details.php?id=1