For purposes of comparison between silicon CD tips and our CNT tips, we can derive the same types of tip metrics from the design dimensions of the CNT tips. For the B-tip, the tip width is , the overhang is , and the VEH is , where is the radius of the ball and is the diameter of the CNT shaft. For the J-tip, these dimensions are , , and , respectively, where is the length of the bent portion of the CNT, is the angle of bending, and is the diameter of the CNT shaft. For B-tips, a typical value of is 40 nm, and a typical value of is 30 nm. For J-tips, a typical value of is 200 nm, and a typical value of is 30 deg.