The Freud FI100 4 in. 6-Tooth Replacement Blade is a replacement biscuit joiner blade for restoring cutting performance on compatible plate joiners. This is a replacement biscuit joiner blade designed for cutting biscuit slots in wood. Model Number: FI100. If your current blade is dull, slowing the tool down, or leaving rough slots, this is the part that gets the machine working like it should again.

Freud lists the FI100 as the original equipment replacement for the JS100 and JS102, and also notes compatibility with many similar biscuit joiners. The 4 in. class blade size, 22 mm bore, and 6-tooth layout are the key numbers here. On a biscuit joiner, correct diameter and bore matter just as much as sharpness because the tool is built around that blade geometry. Get those right and you get clean, repeatable slots that let biscuits seat properly and joints pull together without fighting alignment.

This blade uses six Super Micrograin Carbide teeth for long service life. That matters more than it might on a general-purpose saw blade because biscuit joiners do one very specific job: plunge quickly, cut a clean slot, and retract without tearing up the workpiece. A carbide-tipped replacement blade helps keep cuts smooth in hardwood and softwood while holding its edge longer than a basic steel cutter. Freud also calls out a kickback-reducing design, which is a practical benefit when you want the plunge to feel controlled instead of grabby.

The FI100 is a straightforward part, but it is the kind of part that can make an older tool feel useful again. When a biscuit joiner starts leaving burned edges, fuzzy slots, or feels like it is working harder than it should, the blade is usually where you start. Swapping in the right replacement blade is often faster and smarter than trying to work around poor cuts or forcing a worn blade through finish work, cabinet parts, face frames, or panel glue-ups.

This Freud replacement blade is aimed at woodworkers, cabinet installers, trim carpenters, and serious DIY users who already own a compatible biscuit joiner and want the correct replacement part instead of a maybe-it-fits substitute. If you use a plate joiner for edge joining, alignment during panel glue-ups, or cabinet casework, this is the kind of accessory that directly affects cut quality and how easily the rest of the job goes together.

Freud FI100 4 in. 6-Tooth Replacement Blade Keeps an Older Joiner in the Game

If your biscuit joiner still runs fine but the cuts are getting rough, this is the fix that makes more sense than retiring the tool.

• Who it's for: Woodworkers, cabinet guys, and carpenters running a Freud JS100, JS102, or a similar biscuit joiner with a 22 mm bore.
• Why it stands out: It is an OEM replacement with carbide teeth, the right 4 in. format, and the kind of straightforward fit that saves you from trial-and-error parts shopping.
• Worth knowing: This is a replacement blade only. Check your joiner's arbor size first, because that 22 mm bore is the make-or-break detail.

• What tool is this blade made for? It is made for Freud JS100 and JS102 biscuit joiners, and Freud also states it fits many similar biscuit joiners.
• What size is the bore? The bore diameter is 7/8" (22 mm).
• How many teeth does this blade have? This replacement blade has 6 teeth.
• What material is it designed to cut? It is intended for cutting biscuit slots in wood.