This breadboard features two 830-point solderless breadboards on an 8.5" x 5.25" steel base. Three binding posts allow you to quickly connect and disconnect power. Solderless breadboards are commonly used for prototyping because they allow you to quickly build temporary circuits without soldering. Breadboards accept most through-hole parts and up to #22 wire. When you’re done or want to change your circuit, it’s easy to take your circuit apart. Dimensions Size: 8.5" x 5.25"