【9" x 20T Chainsaw Tooth Brush Blades】 The blade diameter is 9 inches, and the arbor bore size is 1 inch. It is made of high-quality carbon steel that is heat and rust-resistant. This blade is durable, with a long service life, and offers excellent anti-corrosion and wear resistance.It is compatible with Husqvarna, STIHL, EGO, RYOBI, and other brands with mower heads with a 1-inch arbor hole. Oil Saw Toothed Brush Blade for Gear Heads with 1-inch Arbor Holes 10 Teeth Adapter Kit for STIHL FS56RCE, FS91R, FS70R, FS94R, FS111R, FSA90R, FS131, FS91, FS131R, FS56CE, FS111RX, FS111, FS-KM, FS240, FSA135R, FS240R, FSA135, FS55R, FS311, FS561CEM, FS361CEM；For Husqvarna 128LD 525L 130L 322L 128L 329L 525RX 525LK etc. For STIHL Gearhead Part No. 41376400100, 41306410300, etc. For Gear Head Part No. 4180 007 1038, 4180 640 0114, 530096295, 537199202, 581808201etc. 6 Teeth Adapter Kit for Husqvarna 355FRM,355FX,355FXT,555FX,555FXT; for Jonsered FC2255,FC2255W,FC2256,FC2256W；For Husqvarna OEM Parts Gearhead 502434701；537428202；537428301；537428204 ;For Jonsered-Redmax Part No. 502434701；For Troy-Bilt Gear head Part No. 697P00748 【Easy to Install】2 Sets Adapter Kits for Easy Installation on Trimmers-1 x Thrust Washer, 1 x Rider Plate, 1 x Thrust Plate Guard Washer (6 Teeth), 1 x Collar Nut, 1 x L-Wrench;1 x Thrust Washer/ 1 x Rider Plate/ 1 x Collar Nut/ 1 x Screwdriver/ 4 x Attached Washer. 【Note】Check mower model number, or Gear Head Part number before purchasing; different adapters can be installed on different mowers. Product will cut quickly and efficiently. Wear heavy-duty leg guards and goggles when using brush blades. 【9" x 20T Chainsaw Tooth Brush Blades】 The blade diameter is 9 inches, and the arbor bore size is 1 inch. It is made of high-quality carbon steel that is heat and rust-resistant. This blade is durable, with a long service life, and offers excellent anti-corrosion and wear resistance.It is compatible with Husqvarna, STIHL, EGO, RYOBI, and other brands with mower heads with a 1-inch arbor hole. Oil Saw Toothed Brush Blade for Gear Heads with 1-inch Arbor Holes 10 Teeth Adapter Kit for STIHL FS56RCE, FS91R, FS70R, FS94R, FS111R, FSA90R, FS131, FS91, FS131R, FS56CE, FS111RX, FS111, FS-KM, FS240, FSA135R, FS240R, FSA135, FS55R, FS311, FS561CEM, FS361CEM；For Husqvarna 128LD 525L 130L 322L 128L 329L 525RX 525LK etc. For STIHL Gearhead Part No. 41376400100, 41306410300, etc. For Gear Head Part No. 4180 007 1038, 4180 640 0114, 530096295, 537199202, 581808201etc. 6 Teeth Adapter Kit for Husqvarna 355FRM,355FX,355FXT,555FX,555FXT; for Jonsered FC2255,FC2255W,FC2256,FC2256W；For Husqvarna OEM Parts Gearhead 502434701；537428202；537428301；537428204 ;For Jonsered-Redmax Part No. 502434701；For Troy-Bilt Gear head Part No. 697P00748 【Easy to Install】2 Sets Adapter Kits for Easy Installation on Trimmers-1 x Thrust Washer, 1 x Rider Plate, 1 x Thrust Plate Guard Washer (6 Teeth), 1 x Collar Nut, 1 x L-Wrench;1 x Thrust Washer/ 1 x Rider Plate/ 1 x Collar Nut/ 1 x Screwdriver/ 4 x Attached Washer. 【Note】Check mower model number, or Gear Head Part number before purchasing; different adapters can be installed on different mowers. Product will cut quickly and efficiently. Wear heavy-duty leg guards and goggles when using brush blades.