Equipment maintenance

Special tools for car maintenance shown here are very seldom to be used but necessary and indispensable when I'm in a standstill situation such as narrowest, no place for handle waving. Strong chain connected inside as their inner mechanical construction they were designed, the in-put rotation power point could be moved, in addition, final tightening torque could be acceptable. 9.5mm and 12,7mm squared shapes are the same as ordinary socket wrench handles promptly. 9,5mm "Barrier Wrench" was used for replacing main engine mount of B-Vectra a year ago, no other wrench could be available to access the point on the servicing from the bottom side of the engine room. Final additional tightening torque could be applied safe only with this "Barrier Wrench".
Also, old but in good condition air compressor was serviced on belt tension and on discharging of bilge, not a litter water in the bottom of the air tank was done.