Fuel filter tool set

What do the symbols mean?

Fuel filter tool for Chevrolet, Citroen, Fiat, Peugeot, Opel, Saab and Suzuki, etc. The tool can be used to dismantle the filter housing when replacing filter inserts on 1.3, 1.9, 2.0, 2.2, 2.8 and 3.0 Diesel engines. The set includes a holding tool and a filter bowl tool with a 115 mm socket.