| Brand | Black & Decker |
| Product | Spool Cap Lock |
| Part Number | 597842-00 |
| Alternative Part | 385022-03N / 385022-03 |
| Compatibility | GL4525 & STC1820 Trimmer |
| Material | High-impact ABS plastic |
| Function | Secures spool & line |
| Mechanism | Snap-in lock tabs |
| Installation | Tool-free, easy fit |
| Durability | Strong, spare recommended |
