... tapping threads "A","AB", Threads for chipboard screw,wood screw,drywall screw;Type "M","UNC","UNF","BSW"threads for Machine threads ... Button head...Socket typesPhillip type,Pozi type,Eleven type,hexagonal type,Torx type,trangle type,slotted point type,square type,Combined type...FinishZinc plated,Nickel plated ... Weight and Measurment 1)Quantity in a plastic bag as per Screw's Size; 2)it is packed 22kg ...