8TEN Full Chisel Chainsaw Chain 20 in.063.404 66DL - 3 Pack

In this review the 8TEN Full Chisel Chainsaw Chain 20 in.063.404 66DL (3 pack) is judged as a value-focused replacement for large Stihl saws. The bottom line: this chain is best for owners of Stihl 066, MS650 and MS660 who need multiple full chisel chains at a lower price than OEM options. The review finds the chain delivers sharp, aggressive cutting and reasonable build quality thanks to 68CrNiMo33 steel cutters and GCr15 rivets, though buyers should double-check fitment before purchase because fit reports are mixed.

Key Features

• 20 in length: Matches common long bars used on heavy-duty saws so it covers large cutting tasks without frequent relinking.
• Full chisel cutters: Provides fast, aggressive cutting and clean slices through softwood and hardwood when properly sharpened and maintained.
• 66 drive links: Ensures correct fit for the specified Stihl models and OEM-compatible bars when the count matches the saw.
• .404 in pitch and.063 in gauge: These dimensions make the chain compatible with saws designed for larger professional chains, maintaining correct tooth spacing and durability.
• Hardened chain and rivets: Cutter steel (68CrNiMo33) and GCr15 rivets promise good initial sharpness and resistance to wear compared with untreated alternatives.

Who It's For

This chain set is aimed at professional or serious homeowner users running large displacement saws like the Stihl 066, MS650 and MS660 who want multiple replacement chains on hand and prefer to save versus buying OEM singles. It is especially suitable for those who cut hardwoods and need a full chisel tooth profile for fast work.

People who should look elsewhere include owners of smaller saws or those who prefer semi-chisel profiles for dirtier work, and anyone who cannot confirm the exact drive link count and pitch on their bar and sprocket; fitment must be verified to avoid compatibility issues.

Pros & Cons

Pros

• Good sharpness out of the box, providing efficient cutting and clean kerfs on hardwood.
• Strong value proposition: three chains for a price that undercuts many OEM options.
• Constructed from high-alloy cutter steel and hardened rivets for solid initial durability.

Cons

• Fitment is inconsistent for some users; verify compatibility with your saw and bar before buying.
• Durability reports are mixed, so longevity may vary with usage and maintenance.

Specifications

Our Verdict

The 8TEN 20 in full chisel 66DL chain (3 pack) is a practical choice for owners of large Stihl saws who need sharp, aggressive cutting at a lower cost than OEM chains. It offers good initial cutting performance and value, but buyers must confirm fitment and be prepared for variable long-term wear depending on use and maintenance.

Frequently Asked Questions

Will this chain fit my Stihl 066?
It is specified for Stihl 066, MS650 and MS660 and matches OEM Oregon 68LX066G, but you should verify drive link count, pitch and gauge on your bar before purchase.

What does full chisel mean for cutting?
Full chisel cutters have square-cornered teeth that cut aggressively and stay sharp for fast sawing, but they are more sensitive to dirt and require careful maintenance.

Are these chains durable?
The chains use high-alloy cutter steel and hardened rivets for good initial durability, though customer reports on long-term wear are mixed and will depend on use and sharpening frequency.