The Ideas C3896 9'' 60º Triangle Patchwork Ruler is a 60-degree angled template with inch scale for cutting large-scale triangular shapes. Made of rigid, transparent 9-inch acrylic with crisp fractional markings, it guides the rotary cutter in clean, slip-free diagonal cuts. Its precise geometry is perfect for creating intricate blocks like the Star of Bethlehem, diamonds, and kaleidoscope effects on cotton fabrics. Recommended for experienced quilters using international patterns and requiring durable inch rulers.