LighTech chain adjusters are obtained from a solid piece, CNC machined from billet aluminium 7075-T6 and 6082 alloys, anodized with stainless steel fittings. The precise machining allows precise adjustment first time every time. To adjust simply turn the small adjuster by hand, which has small detents that click when turned, and a metric scale is stamped into the alloy so you can achieve 100% accurate line up of left and right sides. Fast and accurate chain adjuster setup. Featuring a sleek race design and available in several colors, LighTech chain adjusters are perfect for both track and street. CNC machined from a solid piece of billet Ergal 7075 and 6082 alloys and anodized. External screw allows precise adjustment first time, every time. To adjust, simply turn the small adjuster, which has small detents that click when turned, by hand - 1 click = 0.25 mm.