... deadbolt is 13.5mm.6.Ordering information: Modeldevice NumberDescriptions ML-OK01710-014Suitable for fire doors,wooden doors with sharp ... 018Suitable for heavy doors , metal deadbolt.Other versions like ML-OK02 ML-OK06710-019Suitable for heavy doors , metal deadbolt.Other ... versions like ML-OK02 ML-OK07710-020Suitable for heavy doors , metal deadbolt.Other ...