The chain is made of carbon steel which has been deep-hardened to ensure smooth cutting; These mini chainsaw tool replacements are suitable for 4 inch chainsaw.24V rechargeable lithium battery, you can use it outside without any worries, portable and low energy consumption.able lithium battery, you can use it outside without any worries, portable and low energy consumption.The gear teeth are pointed and wear-resistant, can help you improve work efficiency; With high hardness, the carving chains are not easy to break, durable and practical. The wooden teeth design can make the chainsaw stuck on the branches, cutting more efficient and faster.Our after-sales specialist will reply to your information within 24 hours to solve your problem. Buying WSQIWNI Product, you could not only receive quality products but also a great shopping experience.