I demoed these screws, just a few were actually placed one time, the others are brand new. These are super sharp and start faster than BD expresses. The idea is these rack like cams or like traditional screws, and you only need to add a carabiner and not a whole QD so they are lighter than an express + draw. Plus the screw can be placed while clipped to the rope. And the screw has reverse threads for less dinner plating. And they place quicker because there is no second reach to your hardness to grab and clip a draw. Really these are superior, yet they carry a hefty price tag new. Get 'em cheap from me instead. I've got 3x 13cms, 5x 17cms, and one 22cm. $45 each or $350 for all 9. PM me.