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. left handed design can also be used with screw extractors to remove broken fasteners. Attachable to reversible drills to remove screws, and studs around , garage or on the . Comes in a box for easy carrying and storage. Sizes: 1 or 4 inch, 15 or 64 inch, 7 or 32 inch, 13 or 64 inch, 3 or 16 inch, 11 or 64 inch, 5 or 32 inch, 9 or 64 inch, 1 or 8 inch, 7 or 64 inch, 3 or 32 inch, 5 or 64 inch, 1 or 16 inch Box Size: 14 x 11 x 2cm or 5.5 x 4.33 x 0.8 inch Package Weight: 264g or 9.33oz Material:High speed steel colour:Golden Package Contents: 13 x Drill Bits 1 x 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.