Simplex B Key

Simplex "B" key, Cat 30, Summit and MIRCOM 306B key. Used in Simplex, FCI, Hochiki, Mircom, Potter and RSG panels, pull stations and firefighter telephone systems. 

• Key sleeve labeled as 'B'

Note: The Simplex B key will usually operate Mircom locks if it’s inserted almost fully and then slightly withdrawn. The Mircom 306b key can sometimes work in Simplex locks if pushed in firmly, but success varies and isn’t guaranteed. Both keys are available, but if you can only have one, the Simplex B is the more versatile choice. See second photo for an illustration.