Gypsum Board Screw Dia: #6-#14, 3.5-6.3 Length: 9. ... zinc coated,color zinc coated,blue zinc coated...Usage:Drywall screw do much less damage to wood and are easier ... More and more widely used in wood,instead of wood screw,metal,all kinds of board...Package:1000pcs/box,16-20boxes ... can pack as requiredWe can produce all kinds of drywall screw series products,if you have any related demand, please feel ...