If dust exits at two points - an extractor hose is not enough. For CS 50, CS 70 underfloor trimming saws or TKS 80 bench-mounted circular saw, the dust extraction set helps to pick up dust where it arises: Both at the guard and at the machine itself. The combination of two hoses - diameters D 27 and D 36 - is perfectly aligned with the machines and connects both dust exit points via the Y-piece with the mobile dust extractor, while the antistatic function prevents static charging. Allowing you to work healthily, conveniently and without much dust.