Brand New Universal Steel Trimmer Head 3 Teeth Brush Cutter Blade & 6 Steel 65Mn Razor Trimmer Head This 3 Tooth Brush Cutter Blade has 1 inch hole in center & 6 Steel Razor Teeth & works with straight shaft gas trimmers w/ 1 inch gear case. Also includes 2 adapters for use on other Trimmers. Fire made of Strong Manganese Steel so it'll never wear out! Trimmer head suitable for cutting branches, brush & shrubs. Easy Installation just connect weed trimmer head to the shaft punch of the mower Blade adapter attachment maintenance washer First kit contains1 x Rider Plate/1pc x T-Wrench/ 1 x Screwdriver/ 1 x Thrust Washer/ 2 x different size Collar Nut/ 2pc x L-Wrench/ 2pc x washer. The Second Kit: 1 x Thrust plate guard washer / 1 x Rider plate/1 x Lock nut/ 1 x Thrust washer/ 1 x Lock nut/2 x washer.