The Mountz 145774 Program Lock Key protects from incidental or operator tampering with the programmable settings on the side of select BF, HF, and NF-Series models. To adjust the settings, the Program Lock Key must be plugged into the STC40, HTC-35, or FT-30D Transformer. The RPM & Soft Start settings can only be adjusted with it.

The program lock key is necessary for these BF, HF, and NF-Series models:

• BF-Series Mini Screwdriver Models
• BF-Series Standard Models
• BF-Series Soft Stop Models
• NF-Series Standard Models
• NF-Series Soft Stop Models
• HF-Series Models

The program lock key cannot be used with these BF-Series and NF-Series models:

• BF-Series Standard Plus Models
• BF-Series Angle And Auto Reverse Models
• BF-Series Soft Stop Plus Models
• NF-Series Standard Plus Models