Yeah, I've always found the halfords stuff very good. The type in this link I've had atleast twenty years (in all three sizes), and they are still going strong (oddly, the reviews don't do them justice, unless quality has changed since I got mine 20 years back... lol).
http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_162686_langId_-1_categoryId_165469
Don't forget a torque wrench, a must in any good tool kit. All very well undoing stuff, but you definately need to do them up again to the correct tightness.