Through terminal block, 261 Series, operating tool Quick and easy connections are guaranteed with this through terminal block (item number 261-429/331-000). Conductors can only be connected to this through terminal block if their strip length is between 8 and 9 mm . Whether in industrial or building applications, our rail-mount through terminal blocks are the perfect solution to quickly and securely connect electrical conductors. Depending on the model, you can use them for either typical through-wiring or potential distribution. This product features conductor terminals and utilizes CAGE CLAMP®. Our CAGE CLAMP® connection provides a reliable and maintenance-free way to connect all types of conductors. You do not need to prepare the conductor in any way, such as crimping ferrules. Dimensions: (67 x 28.1 x 23.3) mm (width x height x depth). This through terminal block is suitable for conductor cross sections ranging from 0.08 mm² to 2.5 mm². Operating tool,push-button is used to operate this mini rail-mount terminal block.