This is a replacement string trimmer head that is used for a range of makes and models of trimmer. The head, sometimes called a cap, is placed on the bottom of the cutting head assembly. The glide cap is simple, but it serves an important function. It helps to keep the head from contacting the ground, so it is not damaged. The string trimmer head often comes into contact with the ground, roots, concrete, and other materials. Therefore, it can become damaged. It might crack or it could simply start to suffer from normal wear and tear after a lot of use. When this happens, owners should always replace the part sooner rather than later. If it is broken or not functioning properly, it could cause problems with the other elements in the trimmer. The replacement is simple and should not take users more than a few minutes to complete. The replacement string trimmer head is a genuine OEM part and it is sold individually. This part is for use only with string trimmers and is compatible with certain models from MTD and Cub Cadet.