Shimano BL-A453 is a bicycle brake lever designed for use with Shimano EXAGE series brake calipers and outer cable casing with liner. It features a quick release button for easy removal of the brake cable, and is compatible with both SLR (Shimano Linear Response) and non-SLR brake systems. The lever's position can be adjusted to suit the rider's preference, and it can be used with either a flat or aero handlebar. The BL-A453 is a reliable and durable brake lever that provides excellent braking performance.