The black decker stb3620l brushless string trimmer delivers longer runtime longer life more durability and efficiency it has a large 33cm cutting swath making it perfect for larger sized gardens the automatic single line feed system saves you time and effort fitted with a variable speed trigger for full control of power and runtime whilst the gear drive transmission maintains constant speed it is also fitted with an easy to use flip edge with a guide for straight edging supplied with 1 x 36 vo