SPECIFICATIONS: Diameter mm: 51 Working length mm: 5 Lasts up to 50 times longer than Bosch hole saw saws 2608580408 when working in hard material Exceptional durability is a key component of Bosch Carbide Technology. Cutting holes in stainless steel with a long service life. Individually ground teeth made of fine, hard carbide. Made of a single piece of metal for maximum stability. **