Added extra spikes because we needed a few extra mainly because we spiked the ends of our edging and we ran out just before we finished. They real are heave duty.
One thing we discovered was that when we curved the brick strips, when the curve is tight, it is difficult to get the spikes down to the brick. I found a 3/8 inch x 4 inch bolt with a nut on the end makes the perfect drift to drive the stakes!