| Name: | Clog (twistlock HMS) |
| Sub Item: | (Climb High) |
| Category: | twist lock |
| Locking Type: | full-auto |
| Locks: | single |
| Unlock Style: | twist |
| Sleeve Rotation: | 90° (unlocked) | 90° (maximum) |
| Shape: | HMS |
| Material: | aluminum |
| Profile: | round |
| Nose: | notch & pin |
| Nose Guard: | none |
| Rivets: | domed: sharp edged |
| Gate Shield: | none |
| Weight: | 100.9 g |
| Dimensions: | Length: 123.08 mm Width: 75.06 mm Depth (basket end): 12.02 mm Depth (runner end): 12.04 mm Gate Opening: 21.20 mm |
| Strength Ratings: |  2200 KG |
| Other Markings: | Stamped(rollmarked?): CLOG 2200KG BRITAIN Stamped: 342 | CLIMB HIGH |
| Batch Marking Location: | spine-right |
| Summary: | early twistlock from originator of the twistlock |
| Description & Commentary: | This design is one of the earlier twistlock carabiners, in an HMS shaped carabiner. Clog produced the first twistlock carabiners, with advertisments appearing in 1983. These ads show drawings of an asymmetric D carabiner with a sleeve design using diagonal knurling and a 90 degree throw, whereas this example has a 90 degree throw but straight knurling in an HMS shape. As of July 2023, I have not seen an HMS style twistlock carabiner from Clog with diagonal knurling. See also: Clog Twistlock D's with straight knurling and 90 degree throw or 120 degree throw. As with most modern autolockers, the hinge pin includes a lug to guide the locking mechanism. Notably, this is much larger diameter than found these days. The overall size is larger than most modern HMS carabiners as well. This particular example is marked for sale by Climb High, a Vermont climbing gear retailer instrumental in importing European climbing gear into the US in the 1970s. Climb High closed in 2010 after 39 years of operation. This example has a lightly stamped batch marking on the right side of the spine, unlike this other almost identical Clog HMS twistlock. |
