Primeturf Artificial Grass 200pcs Synthetic Pins Fake Lawn Turf Weed Mat Pegs Joining Tape200 Synthetic Grass Pins So you have your artificial grass. The next question is how do you get the synthetic grass to stick to the ground effectively. In addition to using adhesive tape, you can also pin the artificial turf down with Prime Turf Synthetic Grass Pins. Constructed from galvanized steel, the Synthetic Grass Pins are strong and durable with corrosion resistant properties. Each pin is 3mm thick and measures 150mm long with a 30mm U shape