The MCS 110BCD Chainring 5 Hole 42T Black is crafted from CNC machined 6061-T aluminum, providing an almost perfect round circumference for even chain tension and a smoother ride. With a 110mm bolt hole pattern, it is compatible with various setups, making it a reliable and durable choice for cyclists. This lightweight yet robust chainring enhances your bike's efficiency. SKU: MCDS201-42-BLK.