I was service engineer in Medtronic. I used to deal with Ventriculoperitoneal Shunt, Lumboperitoneal shunt, Neuro Drills. Neuro Drills used to make burr hole in the skull, so that Minimal Invasive Surgery can be performed. I used to go for breakdown calls for neuro drills, So the request that i got from the customers that the burr for neuro drills should be reuseable but the company has made burr for the patient safety made non-reuseable.