The FS4S/MB serves the same function as FS4SL/MB but uses a momentary microswitch which is activated when the key is inserted, and deactivated when the key is removed.

It is commonly used to gain access to communal areas in high rises, apartment blocks and other public areas.

Features:

• Material : 316 Marine Grade Stainless Steel

Technical Specifications:

• Requires : FS4-KEY Drop Key (sold separately)

Dimensions:

• Back box, 108 x 108 x 65mm