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The TK810DD kit features six different lengths of self-drilling pan head square drive screws of #8 and #10 sizes. Their unique tip design allows them to drill, tap and fasten metal to metal objects in one-operation without the need to pre-drill. They are manufactured from durable, cold heading steel material and heat treated for optimum drill performance and thread forming.
Dottie® TK810DD Self-Drilling Screw Kit, 1/2 to 2 in, Square Drive, Pan Head, Carbon Steel, Zinc-Plated