Gunsmith Set 61 Bits Of Screwdriver Firearm Tools Kit Pro Gunsmithing Magnetic SummaryChrome vanadium steel material build allows for maximum rust and corrosion protection and reduces wear outsDurable screw driver set is calibrated by heat-treated process for a higher quality buildPowerful magnetic base driver provides a secure hold, preventing slippage during high speed fastening usageAll tools are stored away in a clear portable case that features individual bit holders, allowing easy access and organizationScrewdriver set includes the following bit types in 1/4″ shank: pozi, phillips, slotted, square, torx, spanner hex, tamper proof star, tamper proof hex for driving and fastening applications