| 摘要 |
An alignment device for hole saw includes a first alignment member having a first end having an outer width slightly less than an inner diameter of the hole saw and serves as an alignment bearing surface therefor and a second end configured with a nose to be received adjacent a hole of a work piece and a draw bar and tightening member therewith for drawing the first alignment member against the work piece in a manner wherein the nose is self centering within the hole and thereby maintaining the first alignment member in a predetermined aligned position with respect to the work piece.
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