Sufficient quantity and type are enough to meet your various needs, and you are able to share with your friends who need these home improvement accessoriesStep drill bit set: design in various sizes, 4-12 mm, 3-12 mm, 4-20 mm, they are made of high speed steel, coated by titanium, these step drills are resistant to heat, corrosion and rust, practical and durableCountersink drill bits set: made of quality carbon steel, the surface of the countersunk drill bits is plated with titanium to prevent rust; It is durable for you to use and can serve you for a long time; They are suitable for quick replacement and suitable for most power tools with the 1/4 inches hex shank, the cutting edge is hardened and polished to improve sharpness, all drill bits have a 90 degree angle at this point, allowing peaked and precise counter sinkingAutomatic center punch: automatic center punch is so effective that you are able to mark workpiece with a dimple to prevent screws and drills from wandering, helping you complete work accurately and quickly, save your time and energyWide application: very suitable for drilling, reaming, chamfering, screw heads, etc ; Suitable for chamfering various types of materials such as wood, plywood, aluminum, iron, copper, fiberboard, particle board, plastic, PVC board, etc Shank Type:HexCutting Angle String:90 DegreesColour:GoldenMaterial:High speed steelPackage Contents:3 * Step drill bits6 * 5 Flute counter sink drill bits1 * Automatic center punchOnly 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