This assortment of tamperproof magnetic screwdriver bits are precision-machined for exact fit. The steel is heat treated for long-lasting use. The durable PVC gray block allows for easy storage. The block slides over most screwdriver shafts for easy bit access. The bits meet or exceed applicable ASME / ANSI specifications. Special Features Meets or Exceeds Applicable ASME / ANSI Specifications Material SteelMagnetic Yes Weight 6.9 oz (195 g) Number of Pieces 32 Bits Type Magnetic, Tamperproof Overall Length 1" (2.5 cm) Application PVC Block is Used for Storing the Bits, Which Can Be Used for a Variety of Applications; The Block Can Be Placed Onto Any Screwdriver for Storage Square Bits €” Nut Driver Sizes €” Combo Bits €” Other Bits Spanner: 4, 6, 8, 10; Tri-Wing: 1, 2, 3, 4 TORX Bits T7, T8, T10, T15, T20, T25, T27, T30, T40 Slotted Bits €” Hex Bits 5/64" (2 mm), 3/32" (2.4 mm), 7/64" (2.8 mm), 1/8" (3.2 mm), 9/64" (3.6 mm), 5/32" (4.0 mm), 3/16" (4.8 mm), 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm Phillips Bits €” Style_Name Tamperproof