[EFFICIENT OPERATION]Featuring a double-threaded, U-shaped chip groove, our drill bits evacuation and high work efficiency. For optimal performance and extended life, secure the drill bit at a 90-degree angle and use water or coolant during operation. [NON-SLIP CONNECTION]Designed with precise grooves for strong anti-torsion performance, the handles offer high torque and large load-bearing capacity, ensuring a tight, non-slip connection. Suitable for light electric hammers with a round handle featuring 2 pits and 2 grooves. [SDS PLUS HAMMER DRILL BITS AND CHISEL SET]This comprehensive 13-piece set includes 8 concrete drill bits in 4 sizes (1/4", 1/3", 3/8", 1/2") and 5 chisels (tile, scraping, flat, pointed, U-groove), catering to a variety of drilling needs in home improvement and light commercial projects. [STURDY & MATERIALS]Constructed from YG8C hard steel alloy tips and 40CR carbon steel blades, these rotary hammer drill bits and chisels undergo high-temperature quenching for enhanced hardness and wear resistance, making them ideal for tough materials like concrete, brick, and stone. [SDS PLUS SHAFT COMPATIBILITY]Easily compatible with popular like , , , , and , our SDS Plus drill and chisel set requires no adapters and allows for quick changes, perfect for drilling, cutting, and chiseling tasks on concrete, , and brick walls., Manufacturer: Akfldms