15.24 cm. Quality since 1924. For all gypsum wall boards, sheet rock and plastic. Makes cutouts for switches and outline. Pointed blade for plunge cuts. Be smart wear goggles. Ace Promise Satisfaction Guaranteed. The Ace Promise. If this Ace product, when used for its intended purpose, fails to give you complete satisfaction, return the item to the Ace Hardware store where purchased for free replacement of the same or similar item. www.acehardware.com. Assembled in the USA with US and global components.