What is the minimum rose dimension that can be used with a Steelcraft 61L lock preparation?

The minimum rose that can be used on the 61L (ANSI/BHMA A156.115.18) preparation is 3 7/16".

Steelcraft's 61L lock prep (often referred to as the "Squashed Turtle lock prep") is designed for Bored Locks with Lever Handles and conforms to ANSI/BHMA A156.115.18 Preparation of 1-3/4" Steel Doors and Steel Frames for Bored Locks with Lever Handles.

Image: Steelcraft's 61L lock prep often referred to as the "Squashed Turtle lock prep"


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