Normally supplied for RH cutting, with tool type N, HSS twist drills have a point angle ground to 118o and a lip clearance angle of minimum 8o for smooth cutting operations. Manufactured in different grades of High Speed Steels, the drills are available in various diameters.
| size | flute length | over all length |
| 1/8 inch (3 mm) | 40 | 76 |
| 5/32 inch (4 mm) | 45 | 85 |
| 3/16 inch (5 mm) | 45 | 87 |
| 7/32 inch (5.5 mm) | 45 | 87 |
| 15/64 inch (6 mm) | 60 | 107 |
| 1/4 inch (6.5 mm) | 60 | 107 |
| 9/32 inch (7 mm) | 60 | 107 |
| 5/16 inch (8 mm) | 80 | 120 |
| 11/32 inch (9 mm) | 80 | 120 |
| 3/8 inch (10 mm) | 80 | 120 |
| 7/16 inch (11 mm) | 115 | 160 |
| 15/32 inch (12 mm) | 115 | 160 |
| 1/2 inch (13 mm) | 115 | 160 |
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