| Brand | Drillco |
| Product SKU | 428N120 |
| Category | Reamers |
| Size | Fractional |
| Material | High Speed Steel |
| Finish/Coating | Black & Gold |
| Pack Quantity | 1 |
| Size | 5/16 |
| Overall Length | 4.5/8 |
| Flute Length | 2.3/4 |
| Description | Manufactured from a premium grade of m-7N molybdenum high speed steel. The Nitro Heavy-Duty Construction Reamers have a Ferritic Nitro Carburizing surface treatment which gives a hard protective layer to the reamer. This increases hardness (Rc 75-80) without increasing brittleness which is measurably harder than high speed steel. Body and clearance are gold and black surface treated for maximum lubricity. |