Â�¢ used with boring bar for presetting of cutting tool â�¢ change in setting of the tool measures variation in bore dimension. Â�¢ powerful magnet without on-off facility. Â�¢ â��vâ�� is hardened & ground within 5 micron. Â�¢ the included angle of v is 120âº. Â�¢ hardness 52 - 56 rc. Â�¢ also manufactured as per customer's requirement sr.no. Cat no size (mm) range (mm) 1. Ul - 50601 100 l x 50 h x25 t ã� 20 - ã� 90 2. Ul - 50602 110 l x 45 h x 22 t ã�20 - ã� 75 3. Ul - 50603 90 l x 40 h x 22 t ã� 45 - ã�