The Rift Bow is a Unique Short Bow found in Diablo I.
It is useful early in the game if you find it, but not that useful in the long run.
Stats

The Rift Bow
Short Bow
- Damage: 1-4
- Fires Random Speed Arrows
- -3 to Dexterity
- +2 points to Damage
- Requirements: None
- Durability: 30
- Quality level: 1
- Availability: Single Player and Multiplayer
Diablo I Unique Bows — The Needler (Short Bow "Crossbow") • The Rift Bow (Short Bow) • The Blackoak Bow (Long Bow) • Fleshstinger (Long Bow) • Flame Dart (Hunter's Bow) • Bow of the Dead (Composite Bow) • The Celestial Bow (Long Bow) • Deadly Hunter (Composite Bow) • Eaglehorn (Long Battle Bow) • Windforce (Long War Bow)
Hellfire Unique Bows — Blitzen (Composite Bow) • Flambeau (Composite Bow) • Gnatsting (Hunter's Bow)