Found some CAD of the Jeep grill "Angry Eyes" look on GrabCad and added an extra hole for a keychain. 0.25" and 0.50" keychain hole uploaded
At 100% it's 3.5" long, and so is the keychain.
Original File - https://grabcad.com/library/jeep-tj-angry-eyes-1
Jeep_Grill_Angy_Eyes_Keychain.STEP | 409.0KB | |
Jeep_Grill_Angy_Eyes_Keychain.STL | 126.7KB | |
Jeep_Grill_Angy_Eyes_Keychain_0.25.STL | 128.4KB |