High quality and efficient:blades is made of plastic material. Trimmer replacement blades will provide higher efficiency and strong safety when mowing. Suitable for -GT120 trimmer: 24PC in package.Replacement blades are the only suitable blades for the -GT120 cordless string trimmer. and not easy to break:The replacement blade is enough to cut grass easily.Let you enjoy the happiness cordless string trimmer without any worries. Easy to use: These cutter blade for weed trimmer is very easy to be replaced and convenient ,it can easily mow gardens and lawns.You don't worry about its practicability in lawn or garden. Blade Installation Instructions:According to the shape of the groove of holder, put the cutting blade into the groove of holder, press to make the top of the groove of holder flush with the outer of the blade, and then tighten the hex nut clockwise with a hex wrench to fix it. Colour:red Material:plastic Size:140 x 12mm Package Contents: 24 * String Trimmer Blades Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.