(100-PACK) 4″ Heavy Duty Professional Grade Plastic Landscape & Garden Spikes – Multi Use Weed Fabric, Erosion Netting & Tarp Stakes (4″ Inch Stake)

These work really well once they’re in the ground, but unless the ground is pretty soft, they will break. They really can’t stand much resistance at all, and I ended up “pre-drilling” every hole before pounding them in. Still, for the price they’re the best thing I’ve found. They are barbed so they stay in the ground once they’re in.