3/8″ Up-Cut Spiral Flush Trim Router Bit – 1/2″ Shank (AstraHP Coated)
Stronger than a 1/4″, tighter than a 1/2″—this solid carbide 3/8″ up-cut flush trim router bit hits the routing sweet spot. With a 3/8″ cutting diameter for tighter curves and a 1/2″ shank for pro-level stability, it’s perfect for template work, sign making, and detail trimming. The up-cut spiral design clears chips fast and leaves crisp edges—ideal for router table use, but just as capable handheld. Recommended RPM: 16,000 #row-948861285 > .col > .col-inner { padding: 20px 0px 20px 0px; } #section_1936494204 { padding-top: 45px; padding-bottom: 45px; } @media (min-width:550px) { #section_1936494204 { padding-top: 65px; padding-bottom: 65px; } } @media (min-width:850px) { #section_1936494204 { padding-top: 2px; padding-bottom: 2px; } }
Category: Flush Trim Router Bits
The Sweet Spot Between Strength and Precision
Designed for projects where 1/2″ bits are too bulky and 1/4″ bits fall short, this 3/8″ up-cut flush trim router bit delivers unmatched versatility. Built from solid carbide, it offers superior strength, heat resistance, and edge retention—ideal for repeated use in dense hardwoods, plywood, and composite panels.
The 1/2″ shank minimizes deflection and vibration, while the 3/8″ cutting diameter allows for tight-radius template routing without compromising on control or cut quality. A 1-1/2″ cutting length gives you plenty of reach, and the up-cut spiral geometry ensures fast chip removal and a clean finish on the bottom edge.
Whether mounted in a router table or guided by hand, this bit brings a rare combination of agility, power, and long-term durability to your workflow.
Why It’s a Shop Essential:
- Navigate tight curves without compromising strength
- Smoother, stronger alternative to 1/4″ bits
- Ideal for high-precision template work
- Built to last under demanding use with solid carbide durability
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Standard Shipping · United States: $0.00
Express Shipping · United States: $3.99
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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.
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