Our flag stops are specially made for the 2040 extrusion like our Fence System and other extrusions, which has 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-sized panels. If you are using heavier panels, we would recommend these stops, our more solid micro flip stops here You will receive1 x Red 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 🇬🇧