Through terminal block, 870 Series, CAGE CLAMP® This through terminal block (item number 870-681) is designed for quick and easy connections. Conductors should only be connected to this through terminal block if their strip length is between 6 and 7 mm . Our mini rail-mount terminal blocks are perfect for working in tight spaces thanks to their compact design. With various mounting and actuation options, they offer maximum flexibility. Featuring conductor terminals along with CAGE CLAMP®, this connector delivers reliable performance. Our reliable and maintenance-free CAGE CLAMP® connection makes it easy to connect all types of conductors without having to prepare the conductor. For example, you don't need to crimp ferrules. This through terminal block is suitable for conductor cross sections ranging from 0.08 mm² to 2.5 mm². An operating tool is used to operate this mini rail-mount terminal block.