135-degree split point and twist design, good for self-centering and prevent "walking". Bits are made of high speed steel with a titanium nitride coating for good durability. Special left handed design can also be used with screw extractors to remove broken fasteners. Attachable to reversible drills to remove screws, bolts and studs around the house, garage or on the . Comes in a index box for easy carrying and storage. Sizes: 1/4 inch, 15/64 inch, 7/32 inch, 13/64 inch, 3/16 inch, 11/64 inch, 5/32 inch, 9/64 inch, 1/8 inch, 7/64 inch, 3/32 inch, 5/64 inch, 1/16 inch Box Size: 14 x 11 * 2cm / 5.5 x 4.33 x 0.8 inch Package Weight: 264g / 9.33oz Material:High speed steel colour:Golden Package Contents: 13 * Drill Bits 1 * Storage Box Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.