- With self-piercing grommets: The self-piercing grommets can't cut its own hole in all materials.
- With combined tools: The grommet fastening tool is expensive, the punch tool should be from time-to-time changed. The combined tool even more expensive and it should be often changed or resharpened.
- With our double head Grommet Fastener Set: The grommet fastener tool is durable, the punching tool is cheap so there is no much costs with keeping it sharp.
