Welcome to our shop! This button battery holder comes with a 2.54mm contact pin port, making it easy to insert into a breadboard. It is designed for CR2032 button batteries with a diameter of 20mm, and it is easy to disassemble. The high-performance and quality blade-pin design improves product quality and ensures a longer service life. The holder is made with exquisite craftsmanship, guaranteeing its quality and allowing you to use the product with confidence. Its high practical adaptability ensures that it maintains its high performance for a long time. The item includes three button battery holders and three pin headers. The size of the holder is approximately 33.02 x 27.94mm (1.30 inch x 1.10 inch), with a hole distance of approximately 26.67 x 21.59mm (1.05 inch x 0.85 inch), and an aperture of approximately 3mm (0.12 inch). 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service. Thank you for shopping with us!