I just bought 2 pairs of these, then saw the ones in the link below which have a lockout and claimed to be slightly stronger. Saw some others with an angled section for fixing shelves which looks like a good idea http://cgi.ebay.com.au/ws/eBayISAPI....d=456575149255
4WD 700mm Fridge/Drawer Runners/Slides HEAVY DUTY 100kg | eBay
And then there are these
http://hardware.net.au/index.php?cPa...FUpgpQod5yYA8Q

