Bohning Bow Square Red. Simply slide the indicator back and forth as need to start and finish your D-loop or nock sets. Specifications for Bohning Bow Square: Manufacturer: Bohning Color: Red Features of Bohning Bow Square: Easy to read brace height measurements Use your own nocks for the most accurate fit possible Use the flat side to check cam lean of your bow Package Contents: Bohning Bow Square Bohning 801028: Bow Square Red