When your work requires an extra-long guide rail more than 110'' long, one Center Channel Connector should be paired with the Outside Channel Connectors (57360, sold separately) to provide adequate support at the splice. The result is a guide rail long enough and strong enough to joint and rip even the longest boards of dimensional lumber. The modified dovetail profile on the connectors pulls the components into alignment for a secure, precise connection. For joining guide rails with a total length of less than 110'', a single pair of Outside Channel Connectors is adequate. Made in USA.
I was seriously considering returning my EZSmart Guide Rail Connector, Center Channel, but now I used to it. I think for 14.99 is good enough.