Intro
This instrument has a straight sickle on one end and a straight curet on the other end. If you’re looking to simplify your basic setup for general scaling, this instrument and a posterior sickle is all you need. This instrument also comes in a mini version (see link below).
Links
http://www.practicon.com/item/scaler-h5-l5-pdt-cruise-instrument-r090-7087736/7087736
http://pdtdental.com/pdt-h5-l5-mini-r092/
http://pdtdental.com/pdt-h5-l5-r090/
Photos

PDT H5-L5. Primarily an anterior instrument, but also works well on pre-molars, especially 1st pre-molars.
Video
Mark Frias, RDH
This is one of my favorite instruments in my kit!
My ideal set-up:
H5/H6
Nevi 4
Nevi 2
S204S
McCall 17/18
I’ve used Hu-Friedy version of this (137) for years and include it in all my basic set ups. They also have a 137 mini which has a smaller currette end great fro period pockets.
What is your current favorite Posterior Sickle?
I meant Posterior Scaler 🙂
Hu-Friedy Nevi 2