Tucker Trimmer III You will receive (1) Tucker Trimmer III Ruler size - 13 x 13 Unit sizes available on tool - 24 size options from 1 finished to 12  finished in half inch increments (trim sizes 1  to 13) Step by step illustrated instructions for making half square triangle units, hourglass units, and combination units. Charts for easy conversion of other pattern instructions, instructions for left hand trimming