Executive Letter Opener II Fixed Blade Knife 3.75in Double Edged Dagger EX1. Specifications for Executive Letter Opener II Fixed Blade Knife: Manufacturer: Executive Letter Opener Blade Length: 3.75 in Overall Length: 7.75 in Blade Shape: Double Edge Knife Application: Letter Opener Package Contents: Executive Letter Opener II Fixed Blade Knife Executive Letter Opener EX1: II Fixed Blade Knife 3.75in Double Edged Dagger