28 Jan 2020 Categories: Safety Guides FISA 502 Extraction by skidder This leaflet covers the use of a wire, rope, hydratong or clambunk skidder for timber extraction in forestry and other tree work. Documents to download FISA 502 Extraction by Skidder.pdf(.pdf, 385.52 KB) Previous Article FISA 503 Next Article FISA 504 Print