1. Material: S2 alloy steel2. Weight of a set: option 1 is about 117 grams, option 2 is about 112 grams, option 3 is about 115 grams, option 4 is about 126 grams, option 5 is about 130 grams, option 6 is about 138 grams, option 7 is about 156 grams, option 8 is about 183 grams, option 9 is about 149 grams, option 10 about 184 grams, option 11 about 205 grams, option 12 about 231 grams, option 13 about 206 grams3. Single length: 1, 2, 3, 4, 5, 6 are 50 mm long, 7, 8, 9 are 75 mm long, and 10, 11, 12, 13 are 100 mm long4. Hexagonal handle: 1/4inch (6.35mm)5. Application: electric drill, pneumatic drill, rechargeable drill, electric drill and other tools6. Features: the head has a magnetic design, which can easily absorb small metal parts such as screws and is easy to use. High-precision front, tighter bite, not easy to slip, durable7. Contains: 12 bits, 1 12-hole plastic seat-Option 1: 3 bits with 2.6 mm shank, 1 bit with 3 mm, 1 bit with 3.2 mm, 1 bit with 3.5 mm, 1 bit with 4 mm, 3 bit with 5 mm, 1 bit with 6 mm, 1 bit with 6.35 mm-Option 2: 2 bits with 2 mm shank diameter, 2 bits 3 mm, 2 bits 4 mm, 2 bits 5 mm, 2 bits 6 mm, 1 bit 1.6 mm, 1 bit 2.5 mm-Option 3: 2 bits with 2 mm shank, 1 bit with 2.5 mm, 1 bit with 3 mm, 1 bit with 3.5 mm, 1 bit with 4 mm, 2 bit with 4.5 mm, 2 bit with 5 mm, 2 bit with 6 mm-Option 4: 1 bit with 2.5 mm shank, 1 bit with 3 mm, 2 with 3.5 mm, 2 with 4 mm, 2 with 5 mm, 4 with 6 mm-Option 5: 2 bits with 3 mm shank diameter, 2 bits with 3.5 mm, 1 bit with 3.7 mm, 2 bits with 5 mm, 1 bit with 4 mm, 3 bits with 6 mm-Option 6: 1 bit with a shank diameter of 3 mm, 2 with 4 mm, 3 with 5 mm, and 5 with 6 mm-Option 7: 3 bits with 3 mm shank diameter, 4 bits with 4.5 mm, 1 bit with 4 mm, 2 bits with 5 mm, 2 bits with 6 mm-Option 8: 2 bits with a shank diameter of 3.5 mm, 2 bits with 4 mm, 3 bits with 5 mm, 5 bits with 6 mm-Option 9: 1 bit with a shank diameter of 2.3 mm, 2 3 mm, 1 2.7 mm, 1 3.3 mm, 2 4 mm, 2 4.5 mm, 1 5 mm, 1 5.8 mm, 6 mm 1 branch-Option 10: 1 bit with a shank diameter of 2.3 mm, 2 with 3 mm, 1 with 2.7 mm, 1 with a shank diameter of 4 mm, 2 with 4.5 mm, 1 with 5 mm, and 1 with 5.8 mm, 6 mm 1-Option 11: 2 bits with 3 mm shank diameter, 2 bits with 4 mm, 2 bits with 4.5 mm, 3 bits with 5 mm, 3 bits with 6 mm-Option 12: 2 bits with a shank diameter of 3.5 mm, 2 bits with 4 mm, 3 bits with 5 mm, 3 bits with 6 mm, 2 bits with 6.3 mm-Option 13: 1 bit with 3 mm shank diameter, 2 bits 4 mm, 2 bits 4.5 mm, 1 bit 3.5 mm, 3 bits 5 mm, 3 bits 6 mmSpecification: Package Weight One Package Weight 0.20kgs / 0.45lb One Package Size 15cm * 12cm * 2cm / 5.91inch * 4.72inch * 0.79inch Qty per Carton 146 Carton Weight 30.00kgs / 66.14lb Carton Size 50cm * 50cm * 60cm / 19.69inch * 19.69inch * 23.62inch Loading Container 20GP: 177 cartons * 146 pcs = 25842 pcs 40HQ: 412 cartons * 146 pcs = 60152 pcs