Tried the product by first drilling a hole, then driving the dowel into the wall to the thread and screwing into the drywall with a drill. The first immediately blew off the crosshead so I tried the second with more pressure at a lower speed - same result. Thought maybe the drill was providing too much torque and repeated the process but with a hand screwdriver. The same result telling me these anchors are crap. Do not buy. I throw the whole box in the trash.