WoodlandPRO ArborMAX chainsaw bars are made specifically for professional tree care users. The wide contour body and large radius nose makes this bar much stronger and longer lasting than standard consumer bars. These bars are made of three silicon manganese alloy steel plates that are electrically welded together. The center plate has been hollowed out to reduce weight. Rails are induction hardened for a long life. Sprocket nose tip contains high quality Swiss bearings and is held in place with 4 sturdy rivets.