D&D4 Wiki
Accurate Dagger
Attack bonus if proficient +3
Weapon die ([W]) 1d4
Type melee
Range 5/10
Handedness one-handed
Proficiency category superior
Weapon group
Weapon properties off-hand, light thrown, Accurate
Price 1 gp
Weight 1 lb.

An Accurate dagger is a Superior implement, meant for Sorcerer. It represents a lean weapon with a very narrow blade, resembling a stiletto. It is designed to assist classes that use the dagger as an implement. [Dr385:49]

There is a +1 bonus to attack rolls using an accurate implement.