The Bostitch Spring 100316 is a replacement part specifically designed for Bostitch nailers, compatible with models such as wm45b and rn45b. Made by the trusted brand Bostitch, this spring ensures smooth and efficient operation of your nailer. Manufactured with quality materials, this spring is a reliable and essential component for your power tool. Ideal for DIY enthusiasts and professionals alike, this spring is suitable for various nailing projects around the home and garden.