BIG Bertha means big business - ask anyone involved in the golfing industry. 'Big Bertha has not only been the No. 1-selling wood in the United States but throughout Asia,' said Daniel Ho, manager of Sportsmark Trading, the local distributor for what has become one of the world's most popular brand of golf clubs. The Sportsmark Trading company was established by Harry Ahluwalia in 1988. It is a wholesale dealer in Hong Kong, Macau and China, supplying to pro shops, department stores and retailers. The main brands it distributes are Callaway Golf, Lynx and Power Bilt. Callaway's Big Bertha range, Mr Ho said, had outstripped all other golfing products in sales in recent years. In the Big Bertha range of metal woods are four drivers, available with nine, 10, 11 or 12 degrees of loft, a two-wood known as 'The Deuce', three, four and five fairway woods and the Divine Nine and HeavenWood utility woods. The full range is also now available in the Big Bertha War Bird version, a modified design of the originals that are even more user-friendly. 'The woods are still selling well and, since the Big Bertha irons were launched here, they have been tremendously successful,' Mr Ho said. Released on to the market in 1994, the Callaway Big Bertha irons are notable for the amount of metal in their heads. They may look unconventional, but they are without doubt the 'meatiest' clubs around. With a cavity backing and a thick top edge that is most noticeable at address, these oversized irons are extremely forgiving, which goes some way to explaining their popularity among amateurs. The retail price for a full set of Big Berthas - three woods and nine irons - is between $19,000 and $20,000. The price has not proved a deterrent. A set of irons alone is about $13,000 and individual woods sell for $2,400 apiece. This may seem expensive but, in Britain, the recently released Callaway Great Big Bertha driver sells for GBP525 (about HK$6,560).