1. Materials: c1022, swrch22a, q235 2. Finish: blue or yellow zinc plated, black or grey phosphated 3. Dia:3.5, 3.9, 4.2, 4.8 4. Length:16mm-152mm 5. Packing: 1) bulk in cartons, then in wood pallet; 2) 50/100/200/500/1000pcs in box, then in carton and wood pallet 6. Head: flat/countersunk, bugle head 7. Drive: philip 1) bulk in cartons, then in wood pallet; 2) 50/100/200/500/1000pcs in box, then in carton and wood pallet