This set of three Snap-on box-end wrenches is perfect for any mechanic or DIY enthusiast. With a 10º offset and 12-point drive type, you'll be able to get into tight spaces and apply maximum torque. The wrenches are metric and come in sizes ranging from 13-15 mm to 16-18 mm and 17-19 mm, making them versatile for a variety of jobs. The manufacturer part numbers are XBM1719A, XBM1618A, and XBM1315SA. These wrenches are high-quality and built to last, making them a great addition to any tool collection.