⭐ WOOD MAGAZINE'S ONLY GRADE A CIRCLE JIG – Cut 268 perfectly sized circles from 1½" to 18 3⁄16" in precise 1/16" increments. When WOOD Magazine tested dozens of circle routing systems, only Jasper earned Grade A (competitors received B+ or lower). Ideal for speaker cutouts, rings, inlays, templates, and precision detail work. Part of a 25-year engineer-founded legacy with 100,000+ units sold. 💪 ONE PRECISION SYSTEM — TWO PERFORMANCE LEVELS – Both Standard and PRO use Jasper's legendary CNC-machined pivot holes and precision calibration disc for repeatable accuracy. Choose Standard (hardened acrylic) for everyday projects, or PRO (industrial-grade polycarbonate) for maximum durability and lifetime peace of mind. Same precision geometry. Different materials. Different warranties. 🔧 ENGINEER-FOUNDED PRECISION – Created by aerospace-era engineer Les Jasper who demanded obsessive accuracy. Not mass-market compromise—this is engineer-level precision proven through 25 years and 100,000+ units sold across the complete Jasper system. The Jasper family of circle guides has earned 4.6★ across 2,393 verified reviews. When craftspeople comparison-shop for circle jigs, they choose Jasper. Now you know why. Bullet 4: 📊 STANDARD VS PRO — MATERIAL MAKES THE DIFFERENCE – Standard: Hardened acrylic construction, limited lifetime warranty against manufacturing defects with registration, perfect for everyday shop and DIY use. PRO: Industrial-grade polycarbonate with superior strength and wear resistance, full lifetime replacement guarantee with registration, built for professionals and high-volume users. Both deliver identical Jasper precision. ⚠️ ROUTER COMPATIBILITY CHECK REQUIRED – Fits most compact, trim, and cordless routers including Bosch Colt, DeWalt DCW600/DWP611, Makita XTR01, Milwaukee M18 FUEL, Porter Cable, Ridgid, Ryobi, and more. NOT for full-size plunge routers (use Model 200/240 instead). CRITICAL: Check our detailed compatibility chart before ordering to ensure proper fit and prevent returns. Compatible brands listed for reference only., Manufacturer: Jasper Precision Tools