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In combination with a guide rail, this try square allows the construction of a shooting board for planing any mitre on end grain.
It can be fixed in any position, the angle automatically engages at 0°; 18°; 22.5°; 25.7°; 30°; 36°; 45° and 60°.
Fits all Veritas shooting planes and old Stanley No. 51 shooting planes.