Shimano SL-3S45 is a 3-speed hub shifting lever designed for easy and precise gear changes while riding. It features Shimano's PPS system cable for accurate shifting, a compact and precise design for easy assembly and adjustment, and an easy-to-operate lever for comfortable shifting while gripping the handlebar. The SL-3S45 is compatible with Shimano's SG-3C23 3-speed hub with coaster brake, and it allows for smooth gear changes with minimal pressure on the pedals.