The Ideal Micro-Drill™ is designed for research applications that require round and inverted cone surgical burrs. The drill is constructed of light-weight aluminum alloy for balance and control and is powered by a rechargeable 6-volt nickel cadmium battery. Under normal conditions the unit will function for 8 hours between recharging. The Ideal Micro-Drill™ comes with a set of 5 round burrs. The set includes sizes 0.6mm, 0.8mm, 1mm, 1.2mm and 1.6mm. Additional burr sizes are also available, see below for ordering information.