Case hardened, Piercing Point Screws For Fixing To Light Steel or Wood Studs Without Pre-Drilling Zinc, Yellow Zinc, Black & Grey Phosphated Available Raw material : Carbon steel 1022 Head type: Bugle head Driver: Phillips Thread : Fine Thread ,Coarse thread, Twinfast thread Diameter: 3.5-- 4.8mm Length: 11 - 152mm Finish : Hardened, Yellow Zinc, Black & Grey Phosphated Availabl Packing : Small or bulk packaging, according to customers'' requests Minimum order: one Container Quantity allowance : 5% Payment : T/T OR L/C Price Terms: FOB OR CIF Supply Ability: 15 x 20'' FCL/month Delivery Lead Time: 30--40days