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Greenlee 7310SB Hydraulic Knock Out Punch / Puncher Kit with Hand Pump 1/2" - 4"
Knockout punches cut clean, round holes in electrical panels, enclosures, junction boxes and sheet metal. Electricians and panel builders use them to make openings for conduit, connectors and cable glands without drilling, filing or leaving rough edges.
How to choose a knockout punch
- Manual, hydraulic or battery: manual sets driven by a wrench or ratchet suit occasional holes. Hydraulic sets with a hand pump punch larger holes with less effort, and battery-hydraulic kits are fastest for panel shops.
- Size range: check the punch and die sizes in the set. Ridgid KOPD-52 covers 1/2" to 2" and KOPD-254 covers 2-1/2" to 4".
- Slug removal: Greenlee Slug-Buster punches split the slug so it drops out easily.
- Spare punches and dies: individual punches and dies let you add sizes or replace worn parts.
Popular knockout punches at KHM Megatools
| Model | Brand | Type | Good for |
|---|---|---|---|
| KOPD-52 / KOPD-254 | Ridgid | Punch and die sets | Standard and large conduit sizes |
| Manual Knock Out Puncher Set | Ridgid | Manual set | Occasional panel work |
| 7238SB | Greenlee | Manual kit with ratchet | Electricians punching by hand |
| 7310SB | Greenlee | Hydraulic kit with hand pump | Larger holes in thicker panels |
| LS50L11B / LS100X11SB4 | Greenlee | Battery-hydraulic kit | Panel shops with many holes per day |
| MKP50 / S-Ks hydraulic set | Megatools / S-Ks | Manual / hydraulic set | Budget-friendly panel work |
| KD dies / K2P K3P | Greenlee | Replacement punches and dies | Adding sizes to an existing set |
Manual or hydraulic?
A manual punch is enough for a few holes in thin enclosures. For stainless steel, thicker panels or larger sizes, a hydraulic or battery-hydraulic punch saves time and effort. For small holes, a step drill bit or metal hole saw also works. To bend the conduit that goes into the panel, see conduit benders and other electrical tools.
All products from KHM Megatools are genuine and covered by the manufacturer's warranty where applicable.
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