4 of our most popular blades in one innovative toolset: BS1010 - S10 Blade: Suitable for: steel, plastic & aluminum, BD5010 - D50 Scraper Blade, BN2010 - N2 Blade: Suitable for: brass & cast iron, BC1041 - RD10.4 Rotodrive Countersink Blade. Works best on steel, aluminum, and plastic. Opening lever. A single spring lock will release and close all the tools. Each tool has a separate lever that enables the opening of the unit.