Replacement blade cartridge for the SmartCut® EasyBlade™ Plus Rotary Trimmer. Features a blade wear indicator that changes from green to red when it is time to change the blade. Blade edge is concealed in cartridge for safe and easy installation. Delivers a clean, straight cut. Blade Type: Rotary Trimmer; Cutting Edge Form: Straight; Material(s): Steel; For Use With: SWI-8912.