Preppers need the right tool when working on survival projects. The Grace USA Home Care Screwdriver set comes with 6 varieties of screwdrivers to fit your needs. These screwdrivers are Hollow Ground to fit mainspring, front and rear triggerplate, Browning A-5 tang, and carrier screws. The black oxide finished blades are all square shanked, hardened to R/C 52-56 and made of Chromium-Vanadium steel alloy. The hardwood and steel ferule handles are nickel-plated with a strong, non-slip grip. Grace USA has been hand-crafting high-quality tools since 1941. This manufacturer has a full lifetime warrantee on all products. Don't be without the right screwdriver for the job.