1/4‘’ shank driver bits are suitable for electric screwdriver, hand screwdriver, electric drills. for Ideal for working on car, bicycle and furniture The long screwdriver bits for drill are great for reaching into the pocket hole for inserting or retracting pocket screws steel, the screwdriver bit set has high durability 30Pcs Long Screwdriver Bits contain : SL1.6, SL2, SL2.5, SL3, SL4, SL5, SL6(7 Pcs Slotted 3.0 PH0, 3.0 PH1, PH1, 4.5 PH1, PH2, 4.5 PH2, 5.0 PH2, 6.0 PH2( 8 Pcs for Cross SQ1, SQ2, SQ2.5, SQ2.7, SQ3, SQ4, 8 Pcs Square); T8, T20, T25, T27, T30, T40（7 Pcs There are 2 types, 10 for cm 30 pcs screwdriver bit set, 15cm 30 pcs screwdriver bit set, choosing based on your needs, Manufacturer: XIAOQENAN