What does “Long Track” mean for these keys

These keys are primarily used by locksmiths to decode

Can I use Kwikset bottom pins for all Kwikset locks

General Motors 10 Cut B86 Space & Depth Keys

BMW 2 Track Space & Depth Keys chevrolet-sonic-2012-esr6663431 What does “Long Track” meanBMW 2 Track Space & Depth Keys High Security Space & Depth keys are used for generating sidewinder keys to a specific combination or by cutting by code. This simple process uses your existing sidewinder duplicating machine, instead of buying an expensive High Security Code Machine. Step by step instructions are included on how to use these keys. Specifications: Mfg: BMW Key Blank: HU92RP Code Series: 0001 6000 HBA0001 HBA6000 Spaces: 8 Depths: 4