Premium 1,660 Tie Point Solderless Clear Breadboard with 3 Binding Posts, Metal Backing (8.7" x 5.9")Solderless breadboard ideal for testing, prototyping and experimentation. The clear see thru contact points make it easier for you (or your students) to view inserted wires and component leads. Contact Points: 1,660 1,260 in two 63 x 10 matrix terminal strips 400 in 4 power rails Binding Posts: 3 Features a sturdy aluminum backing, rubber feet with peel to reveal adhesive are included Printed legend indicates columns and rows with numbers and letters,