Proper tension is the key to picking and raking locks. HPC manufactures a wide variety of tension tools to suit the needs and preferences of most every locksmith.

FAQs
What is the 3/4″ Letterbox Tension Tool used for?
This tool is designed for applying torque to locks through letterbox openings, commonly during non-destructive locksmith entry.
Is the letterbox tension tool compatible with wooden and metal doors?
Yes, it works with both wooden and metal doors, as long as the letterbox provides enough clearance to insert the tool.