Grace USA 8 Piece Original Gun Care Screwdriver Set was in your grandfathers gun repair box. This is the set that started it all in 1941 and continues to be a best seller. Each Grace USA Gun Care Screwdriver is custom hollow ground to fit scope screws, plug screws, guard screws, floor plate, sight screws, and many other gun screws. This process is very precise and Grace USA holds their tolerance to -.002 +.000 to get an exact screwdriver tip to screw fit. Edward C. Grace, founder of Grace USA, also owned a gunsmith shop and was determined to create a screwdriver that would be a functional tool for this industry and it continues strong to this day. The square shanked blades are hardened to R/C 52-56 and are not to twist or chip. The screwdriver handle is another important component to this tool. It is turned in Maine to the exact qualifications from Maine hardwood and protected with a nicely stained finish. A quality wooden handle is key to a good grip with hands becoming slippery from oil when working with firearms and these Grace USA screwdrivers provide that great wood handle feel that only gets better with time.