Part Number: 53728SEN. Klein's reputation as a leading producer of professional-quality products is global. This warranty does not apply to batteries. Manufacturer: Klein. Like the industrial fields it serves, Klein Tools has grown dramatically since 1857.
I had one of these that I used on a production line when I manufactured aluminum enclosures. I worked great for years. I used this one and did 20 holes and it was so bad I ordered another brand.