The Diablo D0641A 6-1/2 in. x 40-Tooth Finish Trim Saw Blade is a circular saw blade made for portable saws that need cleaner finish-quality cuts in wood and sheet goods. This is a finish trim saw blade designed for smooth ripping and crosscutting in trim stock, plywood, decking, fencing, and fascia. Model Number: D0641A. If you use a 6-1/2 inch cordless or corded saw and want a better edge than a rough framing blade leaves behind, this is the blade category to look at first.

The 40-tooth alternate top bevel tooth pattern is the real story here. On a blade this size, that tooth count gives you a practical middle ground between speed and cut quality. You are not buying it for demolition work or dirty framing lumber. You are buying it because finish carpentry, trim work, and visible cuts in plywood call for a cleaner edge with less tear-out. That matters when you want less sanding, less cleanup, and fewer do-over cuts.

Diablo uses TiCo Hi-Density Carbide on this blade, and that matters because carbide quality has a direct effect on edge life and overall consistency. Better carbide keeps the tooth edge sharper longer, especially when the blade is seeing repeated trim and sheet-good cuts instead of a few occasional passes. The super thin laser-cut kerf also helps the blade cut fast with less drag, which is a good match for compact circular saws and battery-powered saws where efficiency matters.

Jobsite blade performance is not just about sharp teeth. Blade stability matters just as much once the motor is loaded and the cut gets long. This blade uses laser-cut stabilizer vents to reduce noise and vibration while helping the blade stay cooler. In practical terms, that means a steadier feel through the cut and less tendency for the blade to wander or warp from heat. If you have ever watched a bargain blade start cutting rougher as it heats up, you already know why that feature earns its keep.

The non-stick Perma-Shield coating is another feature that pays off over time. Resin, pitch, moisture, and general jobsite grime can turn a good blade into a frustrating one. This coating helps reduce gumming, rusting, and corrosion, which means the blade stays easier to maintain and more consistent in day-to-day use. It is a small detail until you are cutting treated decking, fence boards, or plywood all week and do not want buildup slowing you down.

From a fitment standpoint, the Diablo D0641A 6-1/2 in. x 40-Tooth Finish Trim Saw Blade is built for portable circular saw use with a 5/8 inch arbor and diamond knockout. It is also marked for use on corded or cordless saws, which makes it a flexible choice if your setup changes between shop work and jobsite work. The 10,000 maximum RPM rating gives it plenty of headroom for common 6-1/2 inch saw applications.

This blade makes the most sense for trim carpenters, remodelers, deck builders, punch-list crews, and serious DIY users who want a cleaner cut from a small circular saw without stepping into a specialty blade that is too narrow in use. If your work includes finish cuts that still need to move at jobsite pace, this is the kind of blade that earns a spot in the truck.

Diablo D0641A 6-1/2 in. x 40-Tooth Finish Trim Saw Blade Gets the Job Done Without Overthinking It

This is the kind of blade you buy when a standard framing blade is leaving rough edges, but you still need jobsite speed from a portable circular saw.

• Who it's for: Trim carpenters, remodelers, deck builders, and serious DIY users cutting plywood, fascia, fencing, and finish material with a 6-1/2 inch saw.
• Why it stands out: The 40-tooth ATB layout, thin kerf, TiCo carbide, and stabilizer vents give you a better-looking cut while still staying practical for everyday saw use.
• Worth knowing: This is a finish-oriented blade, not a rough framing blade. Use it where cut quality matters and keep it out of dirty demo material if you want it to stay sharp longer.

• What type of saw is this blade designed for? It is designed for portable circular saws and is marked for use on corded or cordless saws.
• What materials is this blade best suited for? It is intended for finish cuts in 1X material, decking, fencing, fascia, and plywood.
• What arbor size does it use? The blade has a 5/8 in. arbor and also includes a 13/16 in. diamond knockout.
• What is the maximum rated speed? The blade is marked for a maximum rotation speed of 10,000 RPM.