Jasper 390 XLC Circle Cutter Jig + J601 Spiral Up-Cut Router Bit – Cut 184 Perfect Circles from 7" to 52¾" – Built for Compact, Trim & Cordless Routers – Ultra-Smooth, Clean Cuts – Precision Woodworki

The Jasper 390 XLC Router Circle Cutter Jig + J601 Router Bit Bundle gives you everything you need to create ultra-smooth, precision-cut circles with confidence. Whether you’re building speaker cabinets, tabletops, or custom decor, the 390 XLC lets you cut 184 circles from 7” to 52¾” in precise ¼” steps using compact or cordless routers. It's engineered with hardened acrylic for long-term clarity, stability, and accuracy. Paired with the J601 Spiral Up-Cut Router Bit — a solid carbide, razor-sharp bit designed for ultra-clean cuts — this bundle ensures crisp, clean edges and smooth groove finishes every time. The J601 (¼” cutting diameter, 1” cutting length, ¼” shank) excels in hardwoods, softwoods, MDF, and plywood, making it ideal for fine woodworking, joinery, and speaker work. Together, the 390 XLC and J601 bit unlock high-level performance for woodworkers who demand clean results, pro-level control, and repeatable accuracy in every project. Cut smoother. Work faster. Build better.

• 🔄 184 Precision Sizes – Cut Perfect Circles from 7" to 52¾" in smooth ¼" increments. Ideal for compact, trim, and cordless routers, this jig brings big ideas to life with pro-grade repeatability.
• 🌀 Ultra-Clean Cuts Every Time – Paired with the J601 Spiral Up-Cut Solid Carbide Bit (¼” cutting diameter, 1” cut length), this bundle delivers crisp edges, smooth grooves, and clean finishes. The Ready-to-Route Kit includes calibration disc, pivot pins, centering hardware, and mounting tools—everything you need to start cutting perfect circles right out of the box.
• 💪 Built to Endure – The 390 XLC is crafted from hardened acrylic for long-term workshop durability. The J601 bit powers through hardwoods, softwoods, MDF, plywood, and more with ease.
• 🏆 Trusted by Pros & DIYers – Rated a Top Tool by WOOD Magazine and built to inspire confidence in every cut. Jasper’s system helps dreamers and craftsmen build with precision and pride.
• ⚠️ COMPATIBILITY – Designed for compact, trim, and cordless routers. For full-size plunge routers, see the Jasper 300 series.