GreaTalent 37pc Mini Ratchet Wrench Screwdriver Bit Set with 1/4 inch S2 Steel Bits, 36-Tooth, Magnetic Bit Holder Quick Release, Low Profile 90 Degree Right Angle Offset Reversible Drive Handle

Specifications

? Head Type: Phillips, Pozidriv, Square, Hexagon, Slotted, Torx Security (Temper-Proof)
? Shank: 1/4 inch Hex Shank
? Bit Length: 1inch / 25mm
? Hardness: HRC60+/-
? Material: S2 High Quality Steel. Much better than general steel, chrome-vanadium steel (Cr-V), alloy steel, precision cast steel, stainless steel, etc. S2 steel has high hardness, high torque, high abrasion resistance, good toughness so it is ultra-durable. 

Package (37PCS)

1 x 36-Tooth Mini Ratchet Wrench Screwdriver (4.3" long and 0.4" thick)
Phillips (PH0, 2xPH1, 2xPH2, PH3)
Pozidriv (PZ0, PZ1, PZ2, PZ3)
Square (SQ1, SQ2, SQ3)
Hexagon SAE (3/32, 1/8, 5/32, 3/16, 7/32, 1/4)
Hexagon Metric (H2, H2.5, H3, H4, H5, H6)
Temper-Proof Torx (T8, T9, T10, T15, T20, T25, T27, T30, T40)
Slotted (SL3, SL5)