The WMTec 608.05.05 Socket Wrench Insert is designed for mechanics and professional users who require efficient and reliable torque tools. This insert features a 3-piece design, each segment offering a 17, 19, and 21mm socket, ensuring compatibility with a wide range of fasteners. Constructed with a high-impact plastic material, it's lightweight and easy to use, even in tight spaces. The internal lining promotes stress relief, reducing the risk of damage to your wrench and providing a comfortable grip. Additionally, this insert boasts a durable design, resistant to wear and tear, ensuring long-lasting performance. Its compact size and easy storage make it a convenient and practical addition to your toolkit, perfect for on-site repairs or recreational off-roading.