Six of these with accompanying M3 35-40mm bolt and nut sets keep the belt pulleys in place while adjusting teion. RMV2's must have Teione or adjusting the belts is stress! Keep your Max tuned itead of dreading it. Requires x6 drill holes in the top of Rostock Max V2. Use a template for accuracy before drilling or mark where you want the holes and remove the top to drill. Drill press recommended or tool to eure perpendicular Drill Bit.