1. The bit is made of S2 steel, with strong torque output2. Heat treatment process, good hardness and toughness3. Steel body integrated, strong and durable4. Set storage box, easy to carry and not easy to lose5. Widely applicable to various electrical appliances, automobiles, mechanical maintenance, interior decoration, etc.6. Scope of use: suitable for most hand electric drills/lithium electric drills on the market7. Hand drill clamping range: 0.8-10mm8. Impact drill clamping range: 1.5-13mm9. Electric screwdriver clamping range: about 6.35mmSpecification: Package Weight One Package Weight 0.40kgs / 0.89lb One Package Size 15cm * 10cm * 5cm / 5.91inch * 3.94inch * 1.97inch Qty per Carton 74 Carton Weight 30.00kgs / 66.14lb Carton Size 50cm * 50cm * 60cm / 19.69inch * 19.69inch * 23.62inch Loading Container 20GP: 177 cartons * 74 pcs = 13098 pcs 40HQ: 412 cartons * 74 pcs = 30488 pcs