Special flexible tool to correctly tighten jubilee clips.
This Flexidriver is a highly effective, torque sensitive screwdriver, calibrated to bend when the proper torque is attained.
Apart from that, it's a handy tool with flexible shaft to tighten the clamps properly, also in hard-to-reach places.
Will be supplied with 6, 7 and 8 mm sockets making it almost universally suited for hose clamps.
This product is priced, and sold, as a single set, as depicted.