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| Arrowline | |
| Type: | Tool |
| Continuity: | DC Universe |
| Aliases: | Arrow-line |
| Availability: | Unique item |
| Manufacturer: | Oliver Queen |
| 1st appearance: | More Fun Comics #73 |
The Arrowline was an extension cable that functioned similarily to that of a grappling hook. Green Arrow and Speedy both used them and the ends could be attached to their arrows and fired. They could be used as zip-lines to move from building to building or to ensnare adversaries.