Professional tool designed for efficient lubrication, using high-pressure dual-piston technology to ensure uniform injection of grease and reduce friction loss. Its thickened piston design makes operation more labor-saving and suitable for long-term operations. The transparent leak-proof structure makes it easy to monitor the oil level and avoid waste. It is widely used in daily maintenance of automobiles, construction machinery and other equipment to improve maintenance efficiency and is an indispensable assistant for maintenance personnel.