as the title says.
mine has to be the hand blender.
its just so useful and essential piece of equipment. ive gone through about 5 hand blenders in the past 2 and half years at work. now i've done the smart thing and bought one with product replacement cover for 3 years.
been joking at work that i've gone through more hand blenders than any other chef anyone has seen and that i am likely to get banned from Argos for returning faulty kitchen equipment on a regular basis ha!