Every locksmith on earth knows that HPC tools are reliable, well built and backed by one of the oldest companies in the U.S. Many, many locksmiths insist on tools made by HPC, and when it comes to a reliable and functional manual pick gun these locksmiths invariably carry a Pistol Pick.
The HPG-10 has indeed been around for ages and I don't think it's changed much at all, if any. It has earned its steller reputation. Priced moderately, you might not expect it to outperform other more expensive guns, but in the hands of someone who knows how to use it - it will.
The Pistol Pick comes with 3 pick needles (2 straight, 1 angled) and 2 tension wrenches (1 flexible, 1 rigid). Changing pick needles is fast and easy but you do need a small slot type screw driver to do it.