1. 6 Inch & 8 Inch Steel Wire Brush Cutter Package includes 6 Inch & 8 Inch rotary weed brush and 4 x adapters tools. 8 inch weed brush steel wire wheel brush disc 25.4mm x 200mm trimmer head, fit straight shaft gas trimmer with 1 inch(25.4mm) gear case. 6 inch weed brush steel wire wheel brush disc 25.4mm x 150mm trimmer head. 2. Wide Range of Applications This trimmer brush head has a 1-inch hole in the center, which is suitable for most trimmers (including most stroke, four-stroke, backpack-type mowers). Just need to connect weed brush to the shaft punch of the mower, it can be quickly and easily assembled and disassembled. Can help you meet the needs of mowing and save time in the busy season.