One of the best tools I have come across is the double bladed chaseing machine saves a hell of a lot of time, in chopping a chase with an angle grinder, even more if useing a hammer and bolster, its like a circular saw with two blades which can be set for distance apart, like the one on e-bay, link below
eBay.be: RAINUREUSE SPIT D88E (objet 200369377585 Fin: 05-août-09 13:49:44 CEST)
Ridged tools are about the best when it comes to steel fighting, open ended and closed ended spanners, box spanners with one end bent at right angles, and a hole in it to allow the thread to go through, torx, phillips, flat end, and allen screw drivers, and or keys together with adjustable spanners make up most of the kit in France, no footprints though, for cutting a small angle grinder is the favourite tool, or a Sandvic hacksaw, all plumbers vans have a portable? more like luggable generator, and a small oxy/acetylene kit, together with small quantities of sand, cement, plaster, plasterboard adhesive, bench, trowel, broom, dust pan and brush, rubbish sacks, coffee maker