6Pcs Ball End Hex Key Wrench 4Mm CR-V L-Shape Hexagon Wrench, Black

1.This hex wrench is made of chromium vanadium steel (CR-V), offering high strength and hardness, capable of withstanding frequent rotation and tightening, and resistant to wear and bending. The electroplated finish provides rust and corrosion resistance, allowing for repeated use.2.This ball-end hex wrench features a 25° ball-end for tight spaces, chamfered hex ends that reduce wear, and a long/short arm design where the long arm reaches deep while the short arm doubles torque, this hex wrench easily loosens stubborn screws.3.This L-shaped hex wrench is perfect for home DIY enthusiasts, furniture assembly projects, and bicycle repair. It can be used to disassemble or install hex screws on flat-pack furniture, door handles, towel racks, bicycle brakes and derailleur systems, motorcycle parts, and small machinery or household appliances.4.Select the appropriate metric size, ensuring the hex head fits snugly against the screw head. Fully insert the short or long arm, then rotate to tighten the screw. The ball head design allows for easy operation at a 25-degree angle.5.Always ensure the wrench size matches the fastener size to avoid stripping the threads. After use, wipe the wrench clean and store it dry to protect the surface.