Set square for hand-operated flagstone-cutter

摘要

The lengthwise rule (14) is joined to the end of the horizontal rule (12), and has a supporting side (16) running in its lengthwise direction. This side (16) has a set-back portion (18) adjacent to the horizontal rule. This portion has a predetermined width in the direction of the end of the horizontal rule, also a predetermined length in the direction of the top end of the lengthwise rule. The lengthwise rule can be arranged to hinge on the horizontal one, and it can have top and bottom sections joined by a middle one. The axes of the top and bottom sections can be parallel, the top one pivoting on the horizontal rule. The axis of the middle section is at a predetermined angel to the open end of the rule (12) and to the bottom section. The lengthwise rule also has a set-back portion defined by the top and middle sections.