KWB Bi-Metal Hole Saw 114 mm. The KWB Bi-Metal Hole Saw with a diameter of 114 mm is a versatile tool for various materials. Thanks to its progressive Vario tooth design, it allows for accelerated chip removal, ensuring efficient operation. The HSS bi-metal hole saw is equipped with a high-quality HSS tooth that is alloyed with 8% cobalt, making it extremely durable and providing a long service life. This hole saw is ideal for use on steel, gray cast iron, construction steel, stainless steel sheets, aluminum, bronze, copper, as well as plastics like acrylic and drywall. Wood can also be easily processed. Included accessories: no accessories included.