Features: Porter-Cable 7539 Speedmatic 3 1/4 Peak HP Five-Speed Plunge Router 15 Amps, AC only 100% sealed ball bearings Electronic five-speed with soft start 10,000, 13,000, 16,000, 19,000, 21,000 RPM Maintains constant speed under load 1/2" collet Auto-release collet system ends "frozen" bits Unique design pus bottom bearing closer to work for minimum bit run-out and vibration 3" plunge range with fully enclosed springs Depth rod, and 6 position stop turret Precision machined aluminum motor housing & base Specifications: Porter-Cable 7539 Speedmatic 3 1/4 Peak HP Five-Speed Plunge Router Power -- 120 VAC, 60 HZ Base Dia. -- Shipping Weight -- 3/4 Lbs. Peak HP --1 /4 Rated Input Current (Amps) -- 15 Motor Diameter -- N/A No-Load Speed (RPM) -- 5 speed with soft-start 10,000, 13,000, 16,000, 19,000, and 21,000 Collets: Standard: 1/2" Available: 1/4" & 3/8" Plunging Depth -- 3" Width: 11 1/4" The Porter-Cable 7539 Includes: Router motor base 1/2" collet #42950 collet wrenches #425