Hey mechanics and repair folks, this Hillman Group woodruff key pack is one of those simple but essential supplies you'll be glad to have on hand. You get 14 keys measuring 3/16 x 3/4 inches - the perfect semicircular design that fits into those half-moon shaped slots in shafts. These little guys are crucial for securing wheels, pulleys, and other components to spindles without slipping. The design is smart - they're made not to function when there's excessive force on the shaft, which helps prevent damage to your equipment. They eliminate the need to mill holes near shaft shoulders, saving you time and effort during installation. The quality is solid and consistent across all 14 pieces in the pack. Whether you're working on automotive repairs, machinery maintenance, or various mechanical applications, having these readily available can save you from downtime and frustration. The package is compact (about 1.6x2.5x1.4 inches) so they store easily in your toolbox. One of those basic supplies that every serious DIYer or professional should keep stocked!