Jasper 290 Standard Circle Cutting Guide – Precision Router Jig for Trim, Compact & Cordless Routers | Cut 268 Circles from 1 1/2 in to 18 3/16 in

Overview

The Jasper 290 Standard Circle Cutting Guide is built to help you achieve precise, small-circle cuts with a handheld router. It supports 268 circle sizes, spanning from 1 1/2 in up to 18 3/16 in, giving you flexible options for speaker cutouts, rings, templates, and fine-detail work with repeatable control.

Why this guide stands out

• Original Jasper system geometry delivers smooth, repeatable circles
• Hardened acrylic construction keeps the tool lightweight yet sturdy
• Award-winning design recognized by WOOD Magazine
• Limited lifetime defect coverage with product registration
• Clear reminder: designed for trim, compact, and cordless routers

The compact profile sits close to the router base, which helps you watch the cut line with clarity and minimizes chatter. The precise hole-pattern geometry supports quick alignment, making setup faster across multiple projects and reducing guesswork on busy shop days.

Practical uses and real-world notes

Common applications include speaker cutouts, decorative rings, templates, and other round-detail tasks where consistent geometry matters. In practice, you’ll notice a smooth glide over the workpiece, a stable base, and edges that look clean after a single pass when paired with the right bit.

• Plan and execute circles of different sizes without swapping guides
• Carry the jig between jobs for on-site modifications or in-shop projects

Compatibility note: If you’re using a full-size plunge router, consider Jasper’s 200 or 240 models to ensure optimal fit and performance.

Durability and warranty details

The hardened acrylic keeps the jig light while standing up to frequent use. When you register the product, you’re covered by Jasper’s limited lifetime warranty against manufacturing defects, giving you confidence as you work on circles across projects.

In real-world scenarios, the transparent surface helps you align with substrate edges or grain lines, supporting consistent circle geometry and reducing rework. This combination of precision, durability, and thoughtful design aims to make small-circle work both approachable and reliable.