Bosch Professional dust extraction guard GDE 125 FC-T for cutting (suitable for many Bosch Professional angle grinders with protective guard for adjustment w/o tools, disc dia. 115 and 125 mm, in box) :
Bosch Professional GDE 125 EA-S / GDE 125 EA-T / GDE 115/125 FC-T / GDE 230 FC-S / GDE 230 FC-T - YouTube
GDE 115/125 FC-T System Accessories | Bosch Professional