Just a very simple, easy to use, hands free Presta valve inflator. I now have one on my floor pump and got a second to use with an air compressor and inflator set-up.
Gone are the days of pumping up my track disk wheels one-handed to 120psi. The Hiro Side-Lever LOCKING Presta Chuck-Carbon Steel is my savior.
I bought a Pista Plus Floor Pump - it's great ! However, I found the standard chuck that came with the pump hard to use, so I bought the HIRO - it's much easier to use for me. I wish there had been an option to purchase the HIRO chuck as an option on my initial purchase.
Excellent presta chuck