|Defense Bonus:||Very Little|
URW Game Encyclopedia description
The official URW in-game encyclopedia (accessed by the key) describes the small flail thusly:
A light version of the grainflail consisting of two short rods joined by leather thongs or a short chain. The rods are generally made of wood, but are often reinforced with metal bands and/or studs. Effective use of small flail takes great skill. They are primarily a defensive weapon intented to disarm a lightly armed opponent.