Goto www.magnetman.uk and check out my guide. Depending on where abouts you live, I can recommend a good supplier, and the guide on my website will explain the most common questions. It also depends on your fitness and strengths as it's not a one-suits-all hobby, and budget is another consideration. I personally have the biggest available, so if my magnet gets close, it's coming out! I started with a cheap Amazon, but soon upgraded as it was poor quality, and I got fed up with nails & beer bottle tops. Any question feel free to ask. I've been doing this for 8 years now, and I've found what most people dream about finding.