Product Information: Product Name: kwb Bi-Metal Hole Saw 102 mm. Product Description: The kwb Bi-Metal Hole Saw with a diameter of 102 mm is a versatile tool for various materials. It features a progressive variable tooth design that allows for accelerated chip removal. The HSS teeth are alloyed with 8% cobalt, making the hole saw extremely durable, resulting in a long service life. This hole saw is ideal for use on steel, cast iron, construction steel, stainless steel sheets, aluminum, bronze, copper, as well as plastic and acrylic. It also handles drywall and wood without any issues. Included Accessories: No accessories included.