Pitch: 3/8" Low-profile, Gauge: 1.3 mm (0.05"), Number of Drive Links: 57. They are made of high-strength steel. Excellent cutting performance and sharp edge, longer chain life. Better control, less kickback. Sawing safety effectively improves your work efficiency. These are micro chains with small teeth, often used on pruners or small chainsaws. Package Contents: 1 x 16" (40cm) Guide Bar, 4 x Chainsaw Chains.