Tool handle treatments may be applied for convenience, grip, or safety. See also List of tool treatments, for a more general view.
- Knurling is cut into a tool's handle to increase grip
- Plastic-coating provides some cushioning, and can provide color-coded tool identification. For tools with two handles (e.g. a pair of pliers), both handles are typically given the same color grip, but exceptions exist, particularly where a tool's jaws have important differences that are not immediately obvious (as with a crimper, for instance). Plastic coating may be applied by the factory, or the user. Plastic coating generally does not provide electrical protection.
- Electrical insulation protects the user if the tool contacts live voltage