Features: The screwdriver bit set includes the most commonly used screwdriver accessories. The set includes hex, spline and star bits in various sizes and different length. There are two-bit holders of different size(1/2in Dr.x100mm, 3/8in Dr.x10mm) in this bits set. The metal case that bits come in is an industrial-strength case that is strong and durable. Find the right drill bit set for the job working on repairs, remodelling, or any other household project. Specifications 1 Pc × 100mm Tooth Bits T(52) 2 Pcs x Bit Holders(1/2" Dr.x100mm, 3/8" Dr.x10mm) 5 Pcs x 30mm Spline Bits M(5, 6, 8, 10, 12) 5 Pcs x 75mm Spline Bits M(5, 6, 8, 10, 12) 7 Pcs x 30mm Hex Bits H(4, 5, 6, 7, 8, 10, 12) 7 Pcs x 75mm Hex Bits H(4, 5, 6, 7, 8, 10, 12) 7 Pcs x 30mm Star Bits T(20, 25, 30, 40, 45, 50, 55) 7 Pcs x 75mm Star Bits T(20, 25, 30, 40, 45, 50, 55) 1 Pc × Storage Box