| Name: | DMM Big Boa Screwlock |
| Category: | screw lock |
| Locking Type: | manual |
| Locks: | screw |
| Unlock Style: | gate stopped - gate stop |
| Sleeve Rotation: | 1080° (unlocked) | 1530° (maximum) |
| Shape: | HMS |
| Material: | aluminum |
| Profile: | hollow-trap |
| Nose: | notch & pin |
| Nose Guard: | none |
| Rivets: | domed |
| Gate Shield: | semi |
| Weight: | 100 g |
| Dimensions: | Length: 123 mm Width: 79.5 mm Rope Bearing Depth: 11.5 mm Gate Opening: 24 mm |
| Strength Ratings: |  28 kN |  12 kN |  10 kN |
| Other Markings: | Forged: DMM WALESUK A880 | (ratings) Ⓗ 0120CE Stamped: EAC |
| Batch Marking Location: | spine-exterior |
| Summary: | large 2000's screwlock |
| Description & Commentary: |