Circular holes of various sizes are cut into this aluminum triangle. The holes are convenient for cutting out difficult circles, such as when making film molds.

■Hole types
Diameters: 2mm, 3mm, 4mm, 5mm, 5.5mm, 6mm, 7mm, 8mm, 9mm, 9.5mm, 10mm, 11mm, 12mm, 13mm, 13.5mm, 15mm, 17mm, 18mm, 20mm, 22mm, 23mm, 24.5mm, 26mm, 29.5mm, 32.5mm, 36mm