I believe it means that the clubs are so bottom-weighted that at impact, the club's center of gravity is below the ball's equator (thereby 'undercutting' the ball). This should result in a higher launch angle, more back spin, and slightly more distance (theoretically). It certainly helps cut down on the skull shots as even pulling out of the shot a little should keep the club's COG away from the top of the ball.
Cobra golf clubs can be purchased at many stores including Golfsmith, 2nd Swing, Dick's Sporting Goods, American Golf and of course Cobra Golf's official site.
Titleist clubs are a mile better than Cobra. You would class Titleist as premium clubs and Cobra just on the level below them. Saying that, Cobra clubs are still amazing golf clubs and have some lovely things on the market. If you are thinking of which golf clubs to get, you shouldn't really worry about brand names and get clubs you are comfortable with.
Footjoy is the parent company, they own the Titleist line and the Cobra line. They are actually trying to sell the cobra line right now.
Cobra isn't one of the premium golf brands, but it is a very very good make. Their clubs are popular with high handicap golfers and seniors.
One can find cobra golf clubs near one's living location by going online to their homepage and pressing golf locator and inputting one's address or desired location.
No, Taylormade Adidas Golf do not make Cobra clubs. Acushnet own Cobra, they also own Titleist, Pinnacle, Scotty Cameron, Vokey Design and Footjoy.
Go to www.randa.org where you will find a section on 'driving clubs' on the home page, which explains the ruling in more depth.
There are many companies that offer hybrid gold clubs. Some of these companies are Mizuno, Adams, Bridgestone, Cobra, Excel, Nike, Ping, Taylormade, and Titleist.
Cobra gold irons can be bought from most of the Golf Clubs, depending of ones location. From Cobras own website one can search for the dealers on ones own area.
Ping does they are called Ping Rhapsody (current range), Callaway, Taylormade, Adams, Cobra and Nike.
Nike Titleist Taylor made Callaway Cleveland Adams Cobra
Ian Poulter normally uses a Cobra ZL Driver, a Titleist 909 F2 Fairway, Titleist Vokey Wedge, Titleist 909 H Hybrid Fairway, Cobra Pro CB Irons, and a Rife Aruba Putter. But at the Royal Birkdale, he used: Driver: Cobra Speed Pro Fairway Woods: Cobra Speed Pro Irons: Cobra Pro MB Wedges: Vokey Design Spin Milled Putter: Odyssey Black Series This is according to data from when this questions was asked (July 13, 2010).