Features: There are 2 types, 10 for cm 30 pcs screwdriver bit set, 15cm 30 pcs screwdriver bit set, choosing based on your needs. Made of high quality S2 steel, the screwdriver bit set has high durability. The long screwdriver bits for drill are great for reaching deep into the pocket hole for inserting or retracting pocket screws. 1/4‘’ hex shank driver bits are suitable for electric screwdriver, hand screwdriver, electric drills. for Ideal for working on car, bicycle and furniture. 30Pcs Long Screwdriver Bits contain : SL1.6, SL2, SL2.5, SL3, SL4, SL5, SL6(7 Pcs Slotted ); 3.0 PH0, 3.0 PH1, 4.0 PH1, 4.5 PH1, 4.0 PH2, 4.5 PH2, 5.0 PH2, 6.0 PH2( 8 Pcs for Cross ); SQ1, SQ2, SQ2.5, SQ2.7, SQ3, SQ4, SQ5(8 Pcs Square); T8, T10, T15, T20, T25, T27, T30, T40（7 Pcs Torx). Specifications: Material: S2 Steel Type: 10/15cm(optional) Quantity: 30 pcs Package Includes: 1x Screwdriver Bit Set 1x Pouch note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.