Simply click below to discover how you can take advantage of this. I’m sure you’ll agree that’s quite the statement from Motley Fool Co-Founder Tom Gardner.But since our US analyst team first recommended shares in this unique tech stock back in 2016, the value has soared.What’s more, we firmly believe there’s still plenty of upside in its future. In fact, even throughout the current coronavirus crisis, its performance has been beating Wall St expectations.And right now, we’re giving you a chance to discover exactly what has got our analysts all fired up about this niche industry phenomenon, in our FREE special report, A Top US Share From The Motley Fool. See all posts by Manika Premsingh Enter Your Email Address Best UK shares: 3 FTSE 100 shares I’d invest in today for safe, yet robust returns Our 6 ‘Best Buys Now’ Shares Click here to claim your copy now — and we’ll tell you the name of this Top US Share… free of charge! Manika Premsingh has no position in any of the shares mentioned. The Motley Fool UK has recommended Croda International and Halma. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors. Manika Premsingh | Saturday, 15th August, 2020 Renowned stock-picker Mark Rogers and his analyst team at The Motley Fool UK have named 6 shares that they believe UK investors should consider buying NOW.So if you’re looking for more stock ideas to try and best position your portfolio today, then it might be a good day for you. Because we’re offering a full 33% off your first year of membership to our flagship share-tipping service, backed by our ‘no quibbles’ 30-day subscription fee refund guarantee. “This Stock Could Be Like Buying Amazon in 1997” I would like to receive emails from you about product information and offers from The Fool and its business partners. Each of these emails will provide a link to unsubscribe from future emails. More information about how The Fool collects, stores, and handles personal data is available in its Privacy Statement. Buying defensive shares is one of the key fail-safe tactics for investing in uncertain times. If we as investors may have been unconvinced of this in the past, the latest stock market crash and the time since has been a good reminder of defensives’ merit. Not only have many of them sustained performance, they have also seen impressive share price increases, making them among the best UK shares to hold in our portfolios now.The reason for their attractiveness isn’t hard to understand. Their share prices tend to be less volatile than their cyclical counterparts because their revenues are dependable even in recessions. On the downside this means that they don’t tend to show the superlative returns that cyclicals might during booms. But over time, they may still turn out to be clear winners. And we at the Motley Fool like stocks that will make gains for investors over time. These are also some of the best UK shares to buy for investors with low-risk thresholds. 5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…Best UK shares to buyOne of these defensive shares is the FTSE 100-listed Halma, which provides life-saving technologies. These include environmental protection technologies, medical devices, and safety equipment like security sensors and fire detection. It’s in a financially strong place that ensured it doesn’t have to draw on the government’s financing facility. It expects profits to shrink this year, but this is an exceptional year. I think Halma will ride out the year relatively unscathed. It has a high earnings ratio of 46 times, but I think that’s the price today for a safe, growing, and dividend-paying stock. In other words, it’s the price for one of the best UK shares around today.Spirax Sarco Engineering is another FTSE 100 stock whose recent share price movements bear no recollection of the stock market crash. On the contrary, it’s near all-time highs. Despite some softening in its financials recently, it’s obvious why investors like SPX. In its recent update, SPX pointed to potential revenue stability. There are two reasons for this. One, its customers pay for its services with their operating budgets rather than their capital ones. So even if investments take a hit in the recession, the company isn’t impacted. Two, its revenues are from sectors less impacted by Covid-19. For this reason alone, I think it would be one of the best UK shares to buy today.The FTSE 100 speciality chemicals company Croda International is also one of the best UK shares to buy for reasons similar to HLMA and SPX. Its share price too is around all-time highs as investors flock to safer stocks. It too boasts of robust financials. It has also recently completed an acquisition that’s expected to enhance its R&D capabilities. The takeawayAll these stocks are comparatively pricey, but as some of the best UK shares around I’d be better hedged when I buy them and be assured capital gains. If you are still unconvinced, I’ll leave you with these alternative investment ideas as well. Image source: Getty Images.