Powerbuilt Professional Technician screwdrivers are built to meet or exceed ANSI specifications. They feature comfortable, high grip handles constructed of premium acetate or soft-touch double injection polypropylene. Screwdriver shafts are constructed of Silicon Vanadium Chrome Magnesium (SVCM) for light weight and high strength. Tips are precision ground, then sandblasted and magnetized for added grip.All sizes are marked on the handle caps for easy size ID and selection. Powerful, precise and stylish, Powerbuilt screwdrivers offer the look, feel and performance hard-working Techs deserve. A no questions asked replacement policy and lifetime warranty ensure it'll be a long-term relationship.