Features 1、Come with 2.54mm contact pin port, button battery holder can be easily insert into breadboard 2、High‑performance and quality blade‑pin can improve product quality and longer service life 3、Suitable for CR2032 button battery of diameter 20mm, easy to disassemble 4、Adopts exquisite craftsmanship, coin cell holder's quality is guaranteed, you can use the product with confidence 5、Entitled with high practical adoptability, button battery holder's high quality can keep its high performance for a long time Specification Item Type: Button battery holder Port: With a 2.54mm contact pin port, easy to insert into the breadboard (4 pin contact pins should be soldered by the buyer) Size (length x width): Approx. 33.02 x 27.94mm / 1.30 inch x 1.10 inch Hole Distance: Approx. 26.67 x 21.59mm / 1.05 inch x 0.85 inch Aperture: Approx. 3 mm / 0.12 inch Package List 3 x Button Battery Holder 3 x Pin Header