Tungsten carbide-tipped multi-purpose hole saws are designed for use in a wide variety of materials such as soft and hardwoods, chipboard, plywood, MDF, plastic, gypsum/plasterboard, tiles, solid brick, brick with cavities, concrete block, lightweight aggregate block, breeze block and soft density lime-sandstone building block (max 30 N/mm2 hardness). Long Lasting Construction Grade Carbide: a special formulated construction grade carbide is used for the cutting teeth, which provides 10 times longer cutting life.
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![CMT 550-105 multipurpose hole saw, 4-1/8-Inch diameter](http://www.toolmanshop.com/cdn/shop/products/474_1302_fz_550_3f00ad00-f516-48fd-9655-c852ad54c37d_1200x.jpg?v=1571311627)
Tungsten carbide-tipped multi-purpose hole saws are designed for use in a wide variety of materials such as soft and hardwoods, chipboard, plywood, MDF, plastic, gypsum/plasterboard, tiles, solid brick, brick with cavities, concrete block, lightweight aggregate block, breeze block and soft density lime-sandstone building block (max 30 N/mm2 hardness). Long Lasting Construction Grade Carbide: a special formulated construction grade carbide is used for the cutting teeth, which provides 10 times longer cutting life.