• Durable alloy steel for long life
• Specialized heat treat for consistent quality
• Precision milled tip geometry for optimal fastener engagement
• Made in USA

| Stock No | # | Inches | A | B |
| SDM220A | #0 | 1/4 | — | 1 |
| SDM320A | #0 | 1/4 | .125 | 1-15/16 |
| SDM321B | #1 | 1/4 | .187 | 1-15/16 |
| SDM322B | #2 | 1/4 | .234 | 1-15/16 |
| SDM323A | #3 | 1/4 | .234 | 1-15/16 |
| SDM421B | #1 | 1/4 | .187 | 2-3/4 |
| SDM422B | #2 | 1/4 | .234 | 2-3/4 |
| SDM423B | #3 | 1/4 | .234 | 2-3/4 |
| SDM521A | #1 | 1/4 | .187 | 3-1/2 |
| SDM522A | #2 | 1/4 | .234 | 3-1/2 |
| SDM523A | #3 | 1/4 | .234 | 3-1/2 |
| SDM621A | #1 | 1/4 | .187 | 6 |
| SDM622A | #2 | 1/4 | .234 | 6 |
| SDM623A | #3 | 1/4 | .234 | 6 |
| SDMA421 | #1 | 5/16 | .250 | 3 |
| SDMA422A | #2 | 5/16 | .250 | 3 |
| SDMA423A | #3 | 5/16 | .296 | 3 |
| SDMB422A | #2 | 7/16 | .312 | 3 |
| SDMB423A | #3 | 7/16 | .312 | 3 |
| SDMB424A | #4 | 7/16 | .375 | 3 |
| SDMB522A | #2 | 7/16 | .312 | 4-1/2 |
| SDMB523A | #3 | 7/16 | .312 | 4-1/2 |
| SDMB524A | #4 | 7/16 | .375 | 4-1/2 |
| SDMB622 | #2 | 7/16 | .312 | 6 |
| SDMB623A | #3 | 7/16 | .312 | 6 |
| SDMB624A | #4 | 7/16 | .312 | 6 |