Premium solderless breadboard made of high quality, heat resistant ABS plastic perfect for quickly prototyping electronic circuits in hobby and lab applications Standard sets of five 0.1" pitch holes enable compatibility with a large variety of components, each row of five holes is electrically connected internally High quality nickel plated internal contacts ensure reliable and secure electrical connections and provide the perfect fit for a large variety of wires and electronic components Two sets of full length power rails run down the sides of this breadboard making circuit creation fast and easy with access to power along the whole length of the board Eight 3.1mm mounting holes provide a way to securely mount this breadboard into any project in addition to an adhesive backing that allows for quick placement of the board This SchmalzTech premium breadboard is the perfect tool for quickly prototyping electronic circuits. Made of heat resistant, high quality ABS plastic and premium nickel plated electrical contacts this breadboard has excellent mechanical and electrical performance. Each row of five holes is electrically connected as well as each of the four full length power rails, making circuit creation fast and easy. A 0.3" center gap provides compatibility with a large variety of standard components and breakout boards. This breadboard also features eight 3.1mm mounting holes along with an adhesive backing making it possible to securely mount it in any location. Multiple ST-BB breadboards can be hooked together via the interlocking clips along the side of the board making it possible to expand your prototyping area as necessary. This solderless breadboard is perfect for both hobby and lab use and is a great addition to an Arduino or Raspberry Pi kit. Please see the dimensioned drawing for more details regarding hole size and spacing.