This set includes 100 pieces of each size bottom pin

from size 1 to size 6

How is a space-and-depth key used

Expertly machined from Alloy 260 Flat Stock Brass

Hudson Mailbox HL1 Space & Depth Keys Brand_LAB This set includes 100 piecesHudson Mailbox HL1 Space & Depth keys For Hudson Mailboxes Key Blank: HL1 ( CO106 ) Made on an electronic code machine Spaces: 5 Depths: 0 6Special Product Use these keys to originate keys by code FAQs 1. What are Hudson HL1 Space & Depth Keys used for? These keys are designed to help locksmiths cut Hudson mailbox keys accurately by providing precise spacing and depth references for key duplication or code cutting. 2. Are mailbox keys universal? No,