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You’ll be amazed at the difference an auger point makes on a stainless steel square drive screw. Great for use with pressure treated wood or premium materials like redwood and western red cedar because they are truly self-drilling. Passivated type 305 stainless steel provides even more corrosion resistance than the usual type 304 stainless (a bit of nickel really helps). Be sure to test or predrill when you install at the end of a board. Note the non-standard head diameters. Requires a #2 Driver Bit. Made in Taiwan.