Credit is provided by Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC, authorised and regulated by the Financial Conduct Authority. As they work, they use a rounded blade that creates recesses into the wood, allows the user to insert a biscuit and helps to create a strong but invisible joint.

I did contact them to ask a question and this was replied to by Chris Sanders, who gave us the information we needed - Thank you. I certainly wouldn't use it in situations where only 1-2 dowels can fit and wouldn't use it in high stress situations like joining chair pieces, but for wider rail/stile applications like simple frames I wouldn't be worried about failures.

If the item comes direct from a manufacturer, it may be delivered in non-retail packaging, such as a plain or unprinted box or plastic bag. Not that I have either but the domino has a bit of slack in it to allow for any miss alignment but a dowel would have to be spot on.

The Triton TDJ600 Dowelling Jointer delivers double dowel drilling with 710W motor and 32mm spacing.Double dowel drilling with 710W motor and 32mm spacing simplifies furniture and shelving construction. It would be interesting to see a strength test between a domino joint and a TDJ600 joint (with the larger size dowels).