... welded type for choice both professional cutting performance on concrete, brick,reinforced concrete, etc. Laser welded ones can realize heavy-duty ... to 152mmTungsten grit tipped hole saw is to cut holes in concrete, bricks, cements, plaster, wood board, granite slab, etc. ... : 70mm, max diameter: 152mmTCT hole saw is to cut holes in concrete, bricks, cements, plaster, wood board, granite slab, etc. Max ...