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

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

7/64 Heavy Duty Drill Bit - Stubby Length

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

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

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.