| Name: | Petzl William |
| Sub Item: | Screw Lock |
| Category: | screw lock |
| Locking Type: | manual |
| Locks: | screw |
| Unlock Style: | gate stopped - unknown |
| Sleeve Rotation: | 720° (unlocked) | 990° (maximum) |
| Shape: | HMS |
| Material: | aluminum |
| Profile: | flat |
| Nose: | keylock |
| Nose Guard: | none |
| Rivets: | domed: sharp edged |
| Gate Shield: | relieved |
| Weight: | 90.7 g |
| Dimensions: | Length: 117.14 mm Width: 78.14 mm Depth (basket end): 10.76 mm Gate Opening: 25.84 mm |
| Strength Ratings: |  25 kN |  7 kN |  7 kN |
| Other Markings: | Forged: PETZL WILLIAM Pat. | (ratings) (ce-logo)0197 Laser: WILLIAM sL Ⓗ EN362:2004-B  09105US059 |
| Batch Marking Location: | spine-exterior-left |
| Summary: | screwlock version of iconic HMS carabiner |
| Description & Commentary: |