45 total pieces. Excellent like new condition. I don't know the history of this kit, but I don't know that it was ever used. Tested and working as designed. The 4 K Tool Pneumatic Air Right Angle die grinder is a high-speed, 25000Rpm, 1/4" automotive tool designed for precise and efficient grinding tasks. With a palm and pencil grip, it offers comfortable control and maneuverability. Made in the United States by K-Tool, this set includes a single angle die grinder suitable for various automotive applications. The air inlet size of 1/4" ensures consistent airflow for optimal performance, making it a reliable tool for professionals and DIY enthusiasts alike.