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Full Thread Wedge Anchor, 1/2 x 4 in. Size, 1/2 in. diameter, 4 in. length, 1/2-13 in. thread size, 3-1/8 in. thread length, 13 thread per inch, 1/2 in. drill size, Steel material, Zinc Plated Finish, 3/8 x 3-3/4 in. bolt size