1.Increase Comfort Reduce Pain: trimmer grip handle is an attachment that can be installed onto the main shaft of a weed trimmer or edger.The ergonomic trimmer grip allows you to stand up straight,increases comfort and reduces pain during use,which will effectively relieve back strain. 2. and Sturdy Trimmer Handle: Our trimmer handles are made of high quality lightweight aluminum alloy, which is not only durable but also extremely lightweight.Simply slide the vise up and down to find a comfortable position. Make your yard, lawn or garden easy to mow, trim and maintain. 3.Suitable for Most Trimmer Shafts: Our trimmer handle grip for weed eater extension handle is suitable for most trimmer shafts, Fits 99% of all commercial and most residential trimmers, brush cutters and weed wackers.It features an easytoadjust clamp that fits shaft diameters from 22mm to 28mm, match more types of shaft diameters. 4.Easy to Install Use:This for weedeaters handle grip is easy to install on the trimmer shaft. Use the included allen wrench to remove the bolts and vise top, install the vise to the trimmer shaft, adjust the angle or height of the builtin clamp and lock it into place as needed.