Ball bearing.Models:Chainsaw: 021, 023, 025, 038, 041, 042, 048, MS 210, MS 230, MS 231, MS 250, MS 251, MS 380, MS 381, MS 382Blower: BG17, BR 320, BR 340, BR 380, BR 400, BR 420Drill: BT 360Brush cutter: FS 20, FS 360, FS 410, FS 420, FS 490, FS 491, FS 500, FS 510, FS 560, FS 561Atomizer: SG 17, SR 320, SR 340, SR 400, SR 420Shaker: SP 200Miter saw: TS 08 S