| 
| MODEL | TAPER | COLLET | L | D | G |  
| NT30-ER32 | NT-30 | ER32 | 55 | 50 | 1/2"-12W, M12 x 1.75P (USA 1/2"-UNC13) |  
| NT30-ER40 | ER40 | 70 | 63 |  
| NT40-ER25 | NT-40 | ER25 | 50 | 42 | 5/8"-11W or M16 x 2.0P |  
| NT40-ER32 | ER32 | 50 | 60 |  
| NT40-ER40 | ER40 | 60 | 63 |  
| NT50-ER32 | NT-50 | ER32 | 60 | 60 | 1"- 8W or M24 x 3.0P |  
| NT50-ER40 | ER40 | 65 | 63 |  |