There are many ways to create small round holes in sheet metal, but when dealing with larger holes sizes you pretty much have two choices – hole saws or knockout punches.
With knockout punches, you can use manual tools, hydraulic tools, or even electric tools to drive the punches.
Greenlee makes a couple of electric knockout punch drivers, such as the LS60 (which starts at $2800 via Amazon), and Gardner Bender and Maxis make knockout driver adapters that allow for cordless drills and drivers to step in for elbow grease.
Now, Milwaukee is stepping into the fray with their M18 Force Logic high capacity knockout tools and kits.
- Powerful enough to punch holes up to 4″ wide in 12 gauge stainless steel
- Quick connect alignment system for easy setup
- Exact punches and dies with cross-hairs for accurate holes
- Compatible with competitors’ knockout accessories
- Weighs 9.21 lbs
- 7-5/8″ long
- Output force of 10 tons
- Comes with 7/16″ and 3/4″ draw studs
Basic Kit (2676-20)
Small Punch Kit (2676-22) – includes 1/2″ to 2″ Exact punches and dies
Large Punch Kit (2676-23) – includes 1/2″ to 4″ punches and dies
Kits come with (2) XC high capacity lithium ion battery packs, M18/M12 multi-voltage charger, carrying case, quick connect accessory, and the (2) draw studs.
Pricing: $1349 for the basic kit, $1549 for the small kit, $1899 for the large kit
Buy Now(via Home Depot)
Milwaukee’s new M18 cordless knockout punch driver tool looks fairly compact, and has the potential to disrupt the market if the kits are priced right.
Hopefully Milwaukee is considering coming out with new hand-driven knockout punch sets as well. (Pretty please?) Update – Yes they did!