HFi Blade guards GPRS 8 Blade guard for Pentruder HFi Wall saws. Ø 800 mm / 32 " GPRS 12 Blade guard for Pentruder HFi Wall saws. Ø 1200 mm / 48 " GPRS 16 Blade guard for Pentruder HFi Wall saws. Ø 1600 mm / 63 " GFRS 8 Flush cutting blade guard for Pentruder HFi Wall saws. Ø 800 mm / 32 " GH-RS2 Blade guard holder for Pentruder RS2 Wall saw