Under aerobic conditions, oxides are formed on metal surface, which will lead to functional failure over time; China has a long coastline, and its main developed regions are concentrated in the coastal zone of marine climate, where the abundant chloride ions in the air form a corrosion resistance test of the bolt; in addition to geographical location, the different thermal conductivity and potential difference (PD) of different materials in the cladding system cause certain condensed water to adhere to the bolt, leading to rust on bolt fasteners and endangering the safety of the cladding structure; the atmospheric environment is deteriorating day after day. "Smog" endangers human health and the service life of buildings. Acid rain caused by air pollution, UV rays during exposure to sunlight and other factors all pose challenges to the service life and durability of bolts.

Wiskind fastener series developed by the whole R&D team is a leading product that can not only improve the anti-corrosion performance of building fasteners, but also last throughout the full life cycle of buildings. The advent of Wiskind fasteners offers the best solution to common construction fastener problems on the market. The product is applied to the roof and façade of steel structures, including panels, trims and other parts. Its special drillbit-shaped tail makes it efficient and durable in the construction process.Weikai series includes hexagonal flower shaped pan head self drilling and self tapping, hexagonal flange face wood screw, hexagonal flange face self drilling and self tapping screw, hexagonal flange face self drilling and self tapping screw, cross groove flat head self drilling and self tapping screw, countersunk plum blossom hole self drilling and self tapping screw and other products, which deal with different application scenarios respectively.