[Compatible With 18V Batteries] This MT18 MT12 adapter is compatible with 18V batteries, including BL1860B, BL1860, BL1850B, BL1850, BL1840, BL1830B, BL1830, BL1820, BL1815. It allows use of these 18V batteries with 12-volt Lithium-ion tools requiring BL1021B (BL1016), BL1020B, BL1041B, BL1040B, BL1040, BL1015, 197402-0, 197390, CXT models (battery and tool not included). [Safe Protection] Durable design made of plastic material with high temperature resistance, wear resistance, and drop resistance. Lightweight and easy to carry. Designed for safe and convenient use. This product is a battery adapter only. It is not a charger, battery, or power tool, and it cannot recharge batteries. Due to different production batches, labeling may vary and will be random. This does not affect functionality or compatibility. Note: Installation guide not included. Professional installation is recommended. Please verify all specifications to ensure compatibility with your tools. Product design may be updated periodically. Slight variations in appearance or color due to manufacturing differences are normal and do not affect performance. Color: Black Material: Plastic Package Contents: 1 x Battery Adapter (adapter only; tool and battery not included) Only the items listed above are included. Note: Lighting and monitor settings may cause slight color differences between the image and actual product. Measurement tolerance: +/- 1-3 cm.