New Style 90 degree HOPPE profile cylinder with Crescent Knob 
Used on doors that are 2-1/8 to 3 inches thick

Schlage SC1 Keyway
Overall housing Length: 35.5mm / 55.5mm (3-5/8 inch) 
The New Style 90 degree allows homeowner to look at thumb turn and know if door is locked or unlocked.
This cylinder can be converted into a 360 degree cylinder.
Typically used on panels that are 3'' thick.
Some finishes are a ''Resista'' : No-Tarnish Finish

Measurements: 
Inside Distance = 1-3/8 inch (35.5mm)
Outside Distance = 2-3/16 inch (55.5mm) 
Overall (inside + outside) = 3-5/8 inches (91mm) 

Installation Instructions: 
1. Remove Thumb Turn 
2. Insert Aux. Tool and pull down on Release Tab 
3. Turn cam and insert into lock. 
4. Replace Thumb turn.

Color / Finish Options:
Rustic Umber (F8709)
Oil Rubbed Brass (F79)

(No Tarnish Finishes)
Polished Brass (F77-R)
Brushed Chrome (F41-R)
Satin Nickel (F42-R)

NOTE:
Some colors may be special order, resulting in longer shipping times.

Article:
HOPPE Cylinder Installation and Rekeying