Hi Andy, thanks for your question. The guide rails do interlock, to make the join you need 1 x connecting piece 'FSN VEL', Bosch part code for that is 1600Z00009. Alternatively there is a set available, Bosch part code 0615990EE8, which consists of 2 x 1.6m rails, the connecting piece and a carry bag, this gives you 3.2m total length so I think would be well suited for your needs.
Answered by: Bosch Product Expert
Date published: 2016-11-17