1. Lifting the storage barrel of the bit. The design is very creative and easy to carry. Push-type design, you can take out / retract with one press.2. Specially store H4X28MM batch head. That is, the bottom is a 4 mm hexagon and the total length is 2.8 cm. 7 batch heads can be stored.3. At present, most of the ordinary small and medium-sized sets on the market use this size. For example, the wowstick electric screwdriver, small electric screwdriver, ES120 electric screwdriver, and other common sets of 32 in 1 33 in 1 45 in 1 etc. The screwdriver sets are all H4X28MM (the bottom of the head is hexagonal 4 mm, approved The total length of the head is 28 mm), this batch of heads can be stored inside.4. Dimensions: height 52 mm, diameter 30 mm5. Weight: 22gSpecification: Package Weight One Package Weight 0.03kgs / 0.07lb One Package Size 15cm * 10cm * 6cm / 5.91inch * 3.94inch * 2.36inch Qty per Carton 500 Carton Weight 17.00kgs / 37.48lb Carton Size 30cm * 50cm * 56.7cm / 11.81inch * 19.69inch * 22.32inch Loading Container 20GP: 313 cartons * 500 pcs = 156500 pcs40HQ: 727 cartons * 500 pcs = 363500 pcs