Screw Plug *Size:5X25-12X60 *Colour:Red *Capacity:20tons/month *Name:Screw Plug *Name:Screw Plug It's ideal to be used for building materials,even thin.It endures temperature(-40---+80),rust,corrosion,aging,and chemical affect.Meanwhile it's good at electric insulation,tensibility,and high pressure.The structure designed with gear can prevent itself sliding in the hole.