The Designer Notepad is currently the best crafting-boosting equipment available. When equipped, it provides a +15 bonus to crafting. It can be used to craft items that are above your current crafting level.

Designer Notepad
116 Designer Notepad
Type Equipment
Effects Crafting +15
Weight 2
Crafting Blueprint
Parts Required Microchip x2

Plastic x1
Chemicals x1
Glass x1
Metal x1
Battery x1

Workshop Level 5
Skill Required 100