Product details:

The Easy Chuck's Zoom RingTM gives you the ability to open and close the chuck very quickly for various gripping diameter with your finger tips. Use the Zoom RingTM to bring the jaws into position to lightly grab your project then use the supplied chuck key to do your final tightening Easy Jaw System - Change out jaws in less than 30 seconds The Easy JawTM System allows you to change from one set of jaws to the next in about 30 seconds. The patent pending Snap-Lock Technology uses no jaw screws or wrenches to exchange jaws. You simply use the supplied jaw key to depress a keeper latch in the jaw and slide each jaw right out. You then slide the next jaw type until you hear the snap sound. This get you back to turning quickly with the jaws you need to hang onto your project safely. The easiest chuck you'll ever use! The Easy Tools Easy Chuck includes 1-3/8" Dovetail Jaws for gripping 1-3/8" tenons and features an overall expansion of 2". Accessory jaws, sold separately, allow you to put the Easy Chuck through its paces with a variety of project applications - no more fasteners to worry about!