The Dremel Versetip, incidentally is for lead soldering and is inappropriate for fine silver and goldsmithing.
From Cooksongold.com:
"The Dremel Versatip is a portable and highly versatile tool
which can be used in six different ways - including soldering,
melting, hot cutting, welding, shrink wrapping and woodburning
(pyrography). In particular, the Versatip is ideal for small
silver soldering jobs such as chains and jump rings by using the
Versatip with an open flame, without attaching a tip.
This produces a precise, high temperature flame reaching up to
1200 C - perfect for soldering delicate work with less risk of
accidental melting! Six tips are supplied with the Dremel
Versatip: cutting knife, hot knife, flat wide flame head,
reflector, hot blower head and a separate soldering tip designed
for lead and electronics soldering. The Dremel Versatip is
powered by liquid butane gas for quick heat-up and fast
discharge. A flame lock button allows for continuous use, and the
child safety lock mechanism means that the flame cannot be
ignited accidentally. Also included with the Dremel Versatip are
a soldering tin, solder sponge, sponge box and a handy storage
tin".
Just in case it helps someone…
Greetings,
Jose Francisco ALFAYA