For professionals, hobbyists and first time users. This sturdy durable unit is compact and portable. Has a variable speed 1/4 HP motor with a variable speed motor (800 - 3,000 RPM). A multi-purpose unit, grinding, smoothing and polishing all in one. Direct water connection eliminates the drip water system and regulates the coolant flow. Will accommodate discs with 1/2in. center hole or 1/4" -20 screwback mount. Basic Unit has no accessories If this item is not in stock it will be special ordered. Lead time is usually 3-4 weeks, from the time of order. Call or email with questions.