This key blank is for Sargent Door Lock keys stamped with LE
You can see one at the link below
Ilco 1145E SC-8 Box of 50 Key Blanks for Schlage Locks
Dominion Lock
Ilco 1001EB CO-3 Box of 50 Key Blanks for Corbin Locks
Ilco AP1 101AM Box of 50 Key Blanks for Steelcase Furniture | AcmeKey.ca USA & Canada Safes-Safe Deposit Boxes This key blank is forPRICE GROUP C AcmeKey. ca Est. 1965. Fast shipping: USA, Canada & Worldwide. Ilco 101AM AP 1 Box of 50 Key Blanks for Chicago Lock Company Steelcase Office Furniture. We are a wholesale and retail supplier and distributor of automotive, residential, commercial, industrial, padlock, Trailer & RV, heavy equipment, switch, elevator, high security key blanks. Replacement Key blanks for Ilco, DL, Dominion Lock, Cole, Curtis, ESP, Hillman, Jet, JMA, Orion,