A replacement grass guard for the Gtech ST04 & ST05. Lost or broken the grass trimmer guard for your Gtech ST04 or ST05? With this replacement grass guard you can help to stay safe whilst trimming & edging your garden's lawns. If the grass guard on your ST04 or ST05 has cracked or split or you've misplaced it, we recommend you purchase a new one before using your grass trimmer again.