Tension Climbing adjusted the edge profiles and added new 8mm and 10mm edges to make the Flash Board even more comfortable and versatile as a warm-up and portable training tool. The Flash Board was born out of necessity. After travel induced lapses in training and many climbing sessions undermined by a lack of good warm-ups, people at Tension Climbing knew that there needs to be a solution. The compact, cylindrical design makes the Flash Board light, easy to pack, adjustable, and extremely resistant to rotation. Hang it from a pull-up bar, a sturdy tree, a bolt, or pull against the resistance of a solid object or your own foot! This is one tool you dont want to be without. Just dont pack it in your carry-on luggagethe TSA doesnt love that. Edges: Small Crimps 8mm 10mm 15mm 20mm Weight 907 g (2 lb) Dimensions 48,3 x 7,6 x 7,6 cm (19 × 3 × 3 in)