Specifications: When encountering the thick steel bar in the wall, there will be no embarrassment of sticking or damaging the alloy. It can easily pass through thin steel bars within 6mm (1/4 inch). The alloy electric hammer drill bit is made of 40Cr steel and YG8C cemented carbide, which is durable and strong. Based on the materials, after high temperature quenching, the hardness is greatly improved. The surface treatment of the processing makes this product better in appearance and use than generally medium carbon steel drills, It is compatible with all SDS-plus size electric hammer bits such as for Bosch, for DeWalt, for Hitachi, for Hilti, for Makita, for Milwaukee, etc. Item Name: Drill Bits Material: Alloy Steel, Tungsten Carbide Alloy Quantity: 9Pcs Drill Bits Specifications: Metric: 1 x 5mm, 2 x 6mm, 2 x 8mm, 1 x 10mm, 1 x 12mm, 1 x 14mm, 1 x 16mm, Imperial: 1 x 3/16", 2 x 1/4", 2 x 5/16", 1 x 3/8", 1 x 1/2", 1 x 9/16", 1 x 5/8" Features: Durable, Hardware Tools, Anti-rust, Strong Length: 16cm; 6-1/4 inch(Approx.) Notes: 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. Package Includes: 9 x Drill Bits Alert with red light and sound when pedestrians are approaching. The infrared wireless system alerts you the moment someone enters your property. Whats more, the receiver can pair with up to 50 sensors, giving the ability to secure a large area. With this system, youll always have advanced notice that someones on their way to your door. The compact, discreet motion-sensor unit installs on garage, mailbox, fence post... nearly anywhere.