Usage Tips:Suitable for models: compatible with coil models 3405685. Suitable for Einhell GC-ET 4530 set Gardenline Aldi: GLR 450 451 452 453 454 455 456 457 458 459.GLR 450/1 4550/1 4555555555555550/1 0/2 4. 50/3 450/4 450/5.GLT 453 454 455.King Craft: KCR 450, KCR 451, KCR 500 KCR 500 GB. Top Craft: TCR 50, TCR 450 TCR 451 TCR 500.Einhell: RTV 40, RTV 5500 RTV 550/1. Performance power: PWR400DGTA, PWR550GT. Durable material: high-quality automatic ABS feed trimmer spool and durable nylon thread made of copolymer in helix design, flexible and flexible and durable. Coil specifications: 2 x 5 m nylon copolymer resin in spiral design and synthetic trimmer/edge cutting line. The portable cord with a diameter of 1.6 mm supports fast cutting and a longer service life. Easy to use: makes the tedious work of coils easier. Easy to install, just remove the old spool line and replace it with a one to complete the installation. Precautions for use: wear protective glasses and long underwear when using this product to avoid injury caused by overflowing the wires. Remove the plug from the socket before replacing, installing or removing accessories. This wireless weed killer is only suitable for young grasses. Strong weeds use other tools such as blades for trimming.