The Snap-on/KD-51/VACO/Unknown box-end wrenches are high-quality, ratcheting hand tools designed for automotive use. Made in the United States by Snap-on, a reputable brand known for producing durable and reliable tools, these wrenches feature a 6-point drive type for added durability. The set includes both SAE and metric measurements, with the manufacturer part number Rwb-10. Perfect for professionals and automotive enthusiasts alike, these box-end wrenches offer versatility and efficiency for a variety of mechanical tasks.