The present invention relates to a device (100) in a simulation system for simulating an interventional operation. The device (100) is arranged to receive a number of real instruments, preferably at least two. The device (100) comprises a number of moveable carriages (16A-16C) corresponding to the number of the real instruments. The device (100) further comprises a track (20) and an interconnecting member (26). The interconnecting member (26) interconnects the carriages (16A-16C) serially. Each carriage (16A-16C) is provided with an opening for enabling reception of the instruments. Each carriage (16A-16C) further comprises members to receive and lock at least one instrument, and members for receiving a movement from the instrument and generating a force, fed back to the instrument with respect to a simulation characteristic.