1. Replace for: Replacement lever assembly, part number 59843700& 598437-00 &714394862341, The line feeder lever is for line trimmers 2. Compatible with black decker ST7000 Type 1,ST7700 Type 1,ST7700 Type 2,ST7700 Type 3,ST7700-B3LZ Type 3 3. Easy to Use: Line feeder lever 59843700& 598437-00 &714394862341 releases the cutting line from the spool during the auto-feed process 4. Warm Tips: Wear work gloves to protect your hands when installing this part 5. After-Sales Assurance: Pls contact us first when you get some problem, we will offer you assistance asap Compatible with black decker ST7000 Type 1,ST7700 Type 1,ST7700 Type 2,ST7700 Type 3,ST7700-B3LZ Type 3