About product and suppliers:
            1,876 screw head types products are offered for sale by suppliers on Alibaba.com, of which screws accounts for 44%, self-drilling screws accounts for 1%, and drywall screws accounts for 1%. 

A wide variety of screw head types options are available to you, such as gb. 

There are 1,898 suppliers who sells screw head types on Alibaba.com, mainly located in Asia. The top countries of suppliers are Germany, China, and Taiwan, China, from which the percentage of screw head types supply is 1%, 95%, and 3% respectively.