The Eliminator Fly Gun is a spring loaded gun that will kill small house flys and insects by ejecting a 3" round plastic target that will squash them dead before they can get away! If your ready to turn in your fly swatter because the flies keep getting away, this is a good solution without going to a large expense. Harmless to Pets, People, & Windows. The Eliminator Fly gun is sold individually ASIN:B01MFA54RH and also sold in a 4PK - ASIN: B07DBGTMDQ