Creative Grids® 10-1/2in Square Quilt Ruler – perfect for sub-cutting 10in precuts and trimming half-square triangle blocks. Made in the USA with precision acrylic and exclusive non-slip grip that holds position without slipping. Features easy-to-read black and white markings in 1in grids with 1/8in and 1/4in increments, Turn-a-Round technology for 1/2in cuts, 45-degree diagonal line for accurate trimming, and center crosshairs for squaring blocks. Includes dashed seam allowance guides and QR code tutorial link.