The DeWalt DT20663-QZ replacement saw chain is designed to provide smooth, efficient cutting for arborist, tree surgery and grounds maintenance applications. This low-kickback, low-vibration chain combines precise cutting performance with durable construction for demanding use. It has a 3/8" pitch, 0.043" gauge, 56 drive links and is suitable for 16" / 40cm guide bars, with a 4mm file size.