Greenlee7211BB-1/2 Slug-Buster Knockout Punch Unit, 7/8-Inch

I bought the punch to cut holes in 12 gauge unistruts. It goes through this heavy material with ease. The busted slug falls right out; no problems. The threads tend to jamb with metal filings so I've learned to clean up after drilling the center hole.

Very smooth solid action. Cuts easily and accurately. Far superior to the last one I had which was not a name brand tool.

Works as advertised on breaker panels.

I like the knock out buster and the way it cuts the slug in half so that it is easier to take out. I don't like the fact that you have to pre- drill a hole for the bolt before you can finish the job.

This is not what I needed. This is not what is pictured in the Amazon web site. his will not fit in my tool kit.

After spending over $50 through MSCDirect for the same item years ago, I was EXTREMELY pleased to see this item in stock on Amazon at this price. My original punch became worn after many, many uses (even used it several times on stainless steel panels). Thank you for providing an incredible price for a very durable product.

used this item to install cab lights on my truck and would recommend anyone who is contemplating on poking holes on a perfectly good roof that this tool does the job right. nice and clean almost factory like.

I just received my Greenlee 7211BB-1/2 punch. I have used their punches in the past and I have been very pleased with the results. From the part number and from another customer review I determined that the punch would make 1/2" holes. If there had been a photo on Amazon for the "packaged unit" that I received, I could have determined that the punch was for 0.89" hole size(7/8"=0.875"). Apparently the 1/2 in the part number indicates that this punch is for 1/2" conduit. I am aware that the title indicates 7/8-inch; however, it would have been nice if this indicated "7/8-inch hole diameter" to remove any and all ambiguity. I needed a half-inch hole not 7/8-inch. So I will keep the punch for another day and/or go back to the hardware store to get larger grommets for my project. I am sure the punch is of good quality and deserves a 5-star rating; however, only one star should be given for not clarifying the hole diameter in either the Product Features or Product Details.

Muy buena herramienta , fácil de usar y hace unas perforaciones de manera muy adecuada y fácil en la lámina.Podríamos comprar otras de diferentes tamaños.

This very useful tool, which cuts a hole suitable for 1/2 inch electrical conduit fittings, can be simply operated with a 1 inch wrench, and cuts a perfect 7/8 inch hole in sheet steel. It's useful for non electric projects too.

Excelente calidad...

Amazing product, use it daily for pipe. Matched up with replacement piece from a greenlee set.

works as expected