A true one handed bit changer. This thing is great and it really makes the job so much quicker. Similar products are usually spring loaded requiring both hands just to change out a drill bit. With this little beauty you click it forward, remove the drill bit, insert the screw drive attachment, click it back and you're ready to drive in the screw and you didn't even have to set down your drill. Ah yes, it's the simple things in life.
I don't know what I'd do without this connector. I attached one to each of my six drills and leave them on, except when I need the large connector. It made building a series of 48 feet of shelving much easier than if I kept having to re-chuck the drills. Sturdy and long-lasting; a quality Craftsman product.