General description The Prenine 4 CB440 Makita Carbon Brushes Accessory Kit includes high-quality carbon brushes designed for various Makita power tools. These brushes ensure optimal performance and longevity, making them an essential replacement part for your drills and other equipment. Technical specifications Material: Copper + Carbon Item Size: 13 x 10 x 3 mm (0.51 x 0.39 x 0.11 inches) Net Weight: 30 g (1.06 oz) Quantity: 4 pcs Installation Ensure the carbon brush is installed in the brush holder for smooth up and down movement. The gap between the carbon brush and the inner wall of the brush holder should be 0.1-0.3 mm to prevent rolling. Position the surface direction correctly; incorrect positioning may lead to low or no power generation. If the carbon brush lead wire is insulated, install it in the insulated carbon brush holder. Usage Replace the carbon brush when it is worn out to maintain optimal performance. Avoid mixing old and new brushes to ensure even current