Okay, first no pics due to battery malfunction caused by human error.......I forgot they need to be recharged [doh]
They work as shown....except the screws provided chew out or bend easily (why do companies spoil a good product with rubbish screws?)
I think Kreg pocket hole screws with built in washer may be a better choice.
They will also need CAD'ing up to decide the optimum drilling points on different handrail profiles and sizes (with regard to spring length and screw length combined).
They certainly are a better way than trad' handrail bolts, in a time and ease of use viewpoint, then win hands down for an easy secret/hidden method of joining handrail sections. Pre-assembley is possible prior to glue up so final glue up is a doddle on site. ( this also means subtle tweaking of alignment....sanding to shape (for difficult projects) is made far easier).
I suspect this system will succeed where strong language and heavy mallets have failed in the past, just as well as my days of beating things into submission are retreating at an increased pace! ;D
I suspect that they will be found in the workshop for the next handrailing project and others, just as long as we can get the costs reasonable.
The UK supplier has been slow to provide a price ber bolt, requiring the confirmation of quantity desired first.
A little short sighted in my opinion, as they have a product that could fill a huge gap in the market, one we had looked at the Inviss system to fill but kicked into touch due to the specialist tooling required and the large set up cost involved ( not to mention the need to outfit and train each site carpenter/fitter to whom you are supplying joinery with the system to.)
I have no connection with the springbolt company other than just trying out a product supplied for test purposes due to enquiring about them. I am a little surprised that this thread has received no opinion from American users as it is an American invention.....or are you trying to keep it secret??? [big grin]
Rob.