Patent ID: 8684641

Claim:
An assembly comprising: a hole saw comprising a back plate, a skirt depending from said back plate, and a cutting edge provided on said skirt, said back plate having a passageway therethrough and at least one aperture therethrough, said aperture is spaced from said passageway; an arbor rotatably mounted to said hole saw, said arbor extending through said passageway; a collar comprising a wall having first and second end faces and a passageway extending therethrough, and a protrusion extending from said second end face, said arbor extending through said passageway of said collar, said collar being nonrotatably mounted on said arbor and being slideable along said arbor, said collar includes at least one pin extending from said first end face which extends into said at least one aperture of said hole saw to prevent relative movement between said hole saw and said collar; and a nut rotatably mounted on said arbor, wherein said collar is trapped between said nut and said hole saw, and said nut directly bears against said protrusion of said collar, said protrusion causing said nut to cock relative to said collar.