In order to prolong the life of your turbine, it is highly recommended that a bur is kept in your handpiece for storage. These bur blanks are a great alternative to used burs. It is good practice to ensure that all burs that are dull are immediately disposed of. This helps to avoid it being re-used. Re-using dull burs will not only lengthen your procedure time, but will also shorten the life of your turbine.