CNC machine from Ergal 7075 and 6082 alloys, anodized and with stainless steel connections. Allows precise adjustment of the first stroke, each fois.Pour adjust, just turn the small setting device in hand, which includes small snaps that trigger when turning it. A metric scale is stamped in the alloy so that you can get a precise alignment to 100% on the left and right sides. Each kit includes: 2 ready-to-use chain adjusters, easy-to-follow mounting instructions and all the accessories required for each model.