Includes (2) 3607014011 Carbon BrushesNew, Bulk PackedGenuine OEM Replacement Part # 3607014011-2PKConsult owners manual for proper part number identification and proper installationPlease refer to list for compatibilityCompatible with the following: Bosch models: 1773A, 1773AK Concrete Surfacing. Genuine Bosch Replacement part. Set of 2 Carbon Brushes; one brush with a short wire lead attached, one brush with 2 wire leads attached, one short and one long. Worn brushes are often the cause of a poorly running motor. Replacing brushes can fix an intermittent motor. New brushes can restore a motors electric braking. Carbon motor brushes are one of the most commonly replaced power tool components. Because carbon brushes are wear items, meaning that through friction and use they will gradually wear away, they will eventually require Replacement. Worn brushes are common causes of intermittent motor function, reduced electric braking, and reduced motor power. A worn out brush will often be worn down near the wire lead and may be cracked, pitted, or burned. When replacing carbon brushes, be sure to also inspect your armature for burns, cracks, or other damage which indicates a larger motor problem.