12Pcs S2 Steel T6-T40 Magnetic Torx Screwdriver Bits Set 25mm Security Tamper Proof Screwdriver Bit

Specification:  Material: S2 Alloy Steel.  Type:  A: Hollow.  B: Solid.  Surface Treatment: Brown Oxide.  Overall Length: 25mm.  Size: T6, T7, T8, T9, T10, T15, T20, T25, T27, T30,T35, T40.  Hardness: HRC.58-62.  Head Type: Torx.  Shank Type: 1/4 Inch hex.  Quantity: 12pcs.  Features:  -Strong Magnetic, High precision, High hardness and good workmanship.  -Brown oxide surface treatment to enable the high hardness of surface and wear-resistance to keep long tooling life.  -Classification of the S grade to tool steel is shock-resistant. Uses for such tools are chisels and dies to punch, and shear applications. S2 has more vanadium that increases hardness and wear. S2 has more manganese to reduce brittleness.  -In the installation can easily suck screws, electric screwdriver, manual screwdriver, electric drill.  -Exquisite workmanship, each edge can be accurately locked screws, no damage to the screw, and the screwdriver head.  -Strong magnetic can suck the screws easily when used it.  -Can be used for manual electric screwdriver, screwdriver, drill, air and other tools.  Package Included:  12 x screwdriver bits