Chrome 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, Philips, slotted, square, torx, spanner hex, tamper proof star, tamper proof hex for driving and fastening applications Precisely Machined Bits (Chrome Vanadium Steel Construction):Each bit is made from high quality chrome vanadium steel for protection against rust and corrosion from daily use. Heat Treated for Strength:Steel bits have been calibrated through a heat-treated process for extended tool life that will remain resilient throughout multiple usages. Versatile for Multiple Projects:Includes commonly used bits and sizes for a wide range of fastening applications and projects around the house or garage. Magnetic Adaptor:Set includes magnetic bit extension for quick and easy bit changes for your power drill. Strong magnetic base holds bits tight for undisrupted workflow. Center Aligned Tamperproof Holes:Each tamper proof bit is precisely machined for accuracy and precision. Stay Organized:Set comes with compact and sleek case that houses each bit individually so you stay clutter free and organized. Set Includes: – 7 x Slotted: 1/8″, 5/32″, 13/64′, 7/32′, 15/64′, 9/32″, 5/16″- 5 x Pozi: #0, #1, #2 (x2), #3; 6 x Phillips: #0, #1, #2 (x3), #3- 3 x Square: S1, S2 S3; 4 x Spanner: 4, 6, 8, 10- 6 x Hex Security: 2, 2.5, 3, 4, 5, 6 mm- 12 x Hex: 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8 mm- 10 x Star: T8, T9, T10, T15, T20, T25, T27, T30, T35,T40- 7 x Tamper Star: T10, T15, T20, T25, T27, T30, T35- 1 x 2-1/4″ Magnetic Extension Bit Holder