Klein Tools 53728SEN Optimized Design 10-Guage Mild Steel Knockout Punch Set with Black finish, 1/2-Inch

Con un buen huso esta herramienta puede durar suficiente

These tools work well, but be aware the sizes listed are not the actual diameters of the holes they make. They make "trade size" knockouts for 1/2" and 3/4" conduit fittings (well known to electricians). Also, these tools require "pilot holes", which are smaller holes drilled through the center of desired larger hole. A "draw bolt" runs through the pilot hole to guide the punch. Make sure to keep the threads on the draw bolt well cleaned and lubricated since they shoulder a lot of force. I just did a couple test punches and measured with calipers: The 1/2" punch (53728SEN) needs a 3/8" pilot hole, and makes a 7/8" (0.885", 22.5mm) hole. The 3/4" punch (53727SEN) needs a 3/4" pilot hole, and makes a 1-3/32" (1.095", 27.8mm) hole. The description really should include this information.

Quality Klein knockout at a fraction of the price of other brands. Works as expected along with a step drill to punch out 7/8" holes to fit 1/2" electrical box connectors.

Priced better than Greenlee by far. If you’re not using for dozens of holes a day but still need decent quality then this is a good compromise. I’ve cut about 30 holes so far and it still has the same sharp edge it had when it arrived.

Es Excelente producto