Our flag stops are specially made for the 2040 extrusion, like our Fence System and other extrusions, which have a 6mm slot size (typical in the UK and EU) for USA users that use an extrusion from 8020 inc; this has a 5mm slot size, so please use the M5 version here. The flag stop allows easy set-up for repeat cuts and can be easily folded out of the way when not in use. Machined aluminium stop with Stainless Steel flag, supplied with clamping lever and t-nut to fit our M6 extrusion. We recommend these stops for smaller panels. If you are using heavier panels, we would recommend these more solid micro flip stops here You will receive 1 x Blue Aluminium Anodised Body1 x Flag (Stainless steel 3mm)1 x M6 Lever1 x M6 T-Nut 1 x Nyloc Nut2 x M6 Washers Proudly made in Britain by Benchdog Tools 🇬🇧