Yeah, that's actually a couple smaller hose clamps I used to hold it in place.  Also, the surrounds are different.  I really don't care as I already had the tach.  It was easier to do that than get the separate components and a new tach.
Autometer also makes a 
Pro Light shift light  that use a RPM Pill to set.
Also, for a cleaner look, you can get this 
RPM activated module to light up a 
Quick Light shift light.  That way you can keep the standard tach with the same surround as your speedometer.