.var (Virt-A-Mate Archive). These are essentially renamed ZIP files that VaM uses to manage dependencies (hair, clothing, lighting) in one package.
Search the Virt-A-Mate Hub using the "LDR" tag to find the original upload or support thread. LDR.Drill_Tiny_Girl_II.1.var
If you are looking for more details on the creator's other works or need a newer version: LDR.Drill_Tiny_Girl_II.1.var