The split drive anchor is a one-piece tamper-resistant

5/8-18 x 2 3/4 Socket Cap Screw Alloy

1-8 x 3 Hex Cap Screw SS 316 (A4)

5/8-11 x 8 1/2 Simpson Wedge Anchor 303 SS (20)

7/8-9 x 6 1/2 Socket Cap Screw Alloy

1 3/8 x 6 Reduced Shank Drill Bit Cobalt (1/2 Shank) 7/16-14 Socket Cap Screws Alloy The split drive anchor is1 3 8 x 6 Reduced Shank Drill Bit Cobalt (1 2 Shank) . Expands the size range capacity of a 1 2 inch portable drill chuck. Common flute and overall length for minimal adjustment during tool changes. Precision ground for high degree of concentricity between shank and body diameter. Ideal for drilling in low and medium tensile strength materials.