The fischer heavy-duty anchor SL M is a sleeve anchor with an internal thread made from zinc-plated steel. The fischer heavy-duty anchor SL M is ideal for cost-effective anchorings of machines or cantilevers inside. The fischer heavy-duty anchor SL M-N is an internal threaded anchor made from zinc-plated and stainless steel with an M8 and M10 internal thread diameter. The SL M and SL M-N are suitable for pre-positioned and stand-off installation. When the screw is tightened, the cone is pulled into the expansion sleeve and expands it against the drill hole wall. The metric internal thread allows for the use of conventional screws or threaded rods. This increases flexibility and reduces costs.