1、17-Piece Set: This drill bits and chisel set includes 13 drill bits (5.5mm, 6mm, 6.5mm, 7mm, 8mm, 10mm, 12mm, 14mm, 16mm, approx. 3/16\", 1/4\", 5/16\", 3/8\", 1/2\", 9/16\", 5/8\"), 1 pointed chisel, 2 flat chisels and 1 U-groove chisel. 2、High Professionalism: Compared to percussion drills, electric hammer drills can easily generate a more powerful impact for effective and accurate drilling. Before using the hammer drill, you can use a chisel to create a focal point of power, which can then be combined with the hammer drill to meet your processing needs. 3、High-Quality Materials: This drill bits and chisel set is made of 45# steel and YG8C material, hardened for high hardness and nice durability. The robust bit is perfect for impact and ensures precise starting even in even materials such as reinforced concrete. 4、Wide Applications: The SDS-Plus shank is compatible with most rotary hammer drills in the market and meets most of your needs. The drill bit fits seamlessly into the hammer drill and can effortlessly drill, cut and chisel grooves into concrete, stone, bricks, etc. 5、Neat Storage: It comes with a plastics storage box, making each tool stored in a neat and orderly manner, convenient to pick up, easy to carry, and to minimize the risk of loss. Features: 17-Piece Set: This drill bits and chisel set includes 13 drill bits (5.5mm, 6mm, 6.5mm, 7mm, 8mm, 10mm, 12mm, 14mm, 16mm, approx. 3/16", 1/4", 5/16", 3/8", 1/2", 9/16", 5/8"), 1 pointed chisel, 2 flat chisels and 1 U-groove chisel. High Professionalism: Compared to percussion drills, electric hammer drills can easily generate a more powerful impact for effective and accurate drilling. Before using the hammer drill, you can use a chisel to create a focal point of power, which can then be combined with the hammer drill to meet your processing needs. High-Quality Materials: This drill bits and chisel set is made of 45# steel and YG8C material, hardened for high hardness and nice durability. The robust bit is perfect for impact and ensures precise starting even in even materials such as reinforced concrete. Wide Applications: The SDS-Plus shank is compatible with most rotary hammer drills in the market and meets most of your needs. The drill bit fits seamlessly into the hammer drill and can effortlessly drill, cut and chisel grooves into concrete, stone, bricks, etc.、 Neat Storage: It comes with a plastics storage box, making each tool stored in a neat and orderly manner, convenient to pick up, easy to carry, and to minimize the risk of loss. Specifications: Color: Silver Material: 45# Steel + YG8C Package Size: 305 * 240 * 60mm/ 12.0 * 9.4 * 2.4in Package Weight: 2.5kg/ 5.5lb Packing List: 1 * 17-Piece Drill Bits and Chisel Set 1 * 17-Piece Drill Bits and Chisel Set