The Black Diamond Stopper Set Pro #1-13 is an essential for every trad rack, designed with a transverse taper that permits sideways placements in flares and shallow seams. Anodized by size, they're quickly identifiable and rounded edges make for easy removal. Durable aluminum heads and steel cables Transverse taper is versatile in flares, constrictions and parallel cracks Rounded edges for easy cleaning (smaller sizes are straight for better surface contact) Weight : 456 g (1 lb)