Euro Machinist Square 75mm X 50mm (1-5/8 Inch) Thumler's Tumbler This die-struck round solitaire mounting

This die-struck round solitaire mounting is built for professional jewelers seeking a precise

consistent edges across every size in the set

1 × 32mm square disc cutter

Polished rotating wooden mandrel for smooth

Euro Machinist Square 75mm X 50mm (1-5/8 Inch) Thumler's Tumbler This die-struck round solitaire mountingMachined from bar stock (billet) one piece stainless steel construction to DIN 875 II standards. A machinist square is the metalworker's equivalent of a woodworker's try square. Its primary purpose is measuring the accuracy of a right angle (90 degrees). To "try" a surface is to check its straightness or correspondence to an adjoining surface. A small notch has been added to the inside corner of the square to prevent small particles from accumulating