A deburring tool that includes a deburring arm which is held in a flexible relationship with respect to an arbor of the deburring tool. In some implementations, the deburring tool is capable of drilling a hole, deburring the hole with the deburring arm, and machining one or more features in the hole, such as an end chamfer. A plurality of attachment elements are located in the arbor to engage the deburring arm. The deburring tool may also include a second deburring arm that is particularly oriented with respect to one or more cutting elements used for drilling the hole.