The Oregon 649556 Guide Bar and Chain Kit is a genuine Oregon product designed for chainsaws, featuring a 20-inch (50 cm) guide bar (203RNDD025), two high-performance 75EXL072E saw chains, and a comprehensive sharpening kit. The chains have a 3/8-inch pitch, 0.063-inch (1.6 mm) gauge, and 72 drive links. The kit includes essential sharpening tools: a round file, flat file, depth gauge, file guide, and a bar groove cleaner, ensuring optimal chain maintenance and performance. The guide bar utilizes a D025 mount type.