3931 - Cylinder with Large Round Turn Application For use with locks accepting Oval profile cylinders. Specification Fitting of CylinderCylinders are supplied with fixing screw.Standard lengths are 61mm and 71mm.Cylinders are only available up to +10+10 in size (80mm Overall).Decorative and security accessories are available: see Door Furniture section Cylinder Features: Drill Protection as Standard - 5 minutes drilling resistanceEnhanced plug pulling resistanceParacentric key way for resistance to picking and manipulation of system pinsBumping resistance Optional functionsA1 - Classroom function, clockwise rotationB1 - Classroom function, anti-clockwise rotationC1 - Clutch release function Finish Available in satin chrome finish Standards Cylinders for LocksTested in accordance with BS EN 1303:2015Classification:160B0C6D**when used with appropriate security escutcheonFire RatedTested in accordance with BS EN 1634-1:2000Product range is suitable for use on fire resistant and smoke control doors. Downloads 3931 - Cylinder with Large Round Turn (.pdf, 96 kB) Close 3937 - Cylinder with Oval TurnFor use with locks accepting Oval profile cylinders. 3932 - Double CylinderFor use with locks accepting Oval profile cylinders. 3933 - Single CylinderFor use with locks accepting Oval profile cylinders.