Metal 10 Cut Universal Key Blank - GM Best Seller It uses a standard "caulk"

It uses a standard "caulk" style dispensing system

NC ZP PH PAN MS 12-24X1-1/4

Inside Diameter: 2-1/2 Inch

Fender Bracket Retainer Nut - Buick Enclave & Lucerne Chevrolet Equinox & Malibu Hummer Pontiac G5 G6 G8 & Solstice 2003 - On 11518531

Metal 10 Cut Universal Key Blank - GM Best Seller It uses a standard "caulk"Key blanks provide stock for cutting original keys or making duplicates. They are available in high quality brass and nickel plated construction to prevent corrosion. Key types from specific lock manufacturers furniture makers and car and truck companies can be used to duplicate keys for specialized purposes.