Parts for the star locater Grip Plate with degree scale and hole to determine the position of a star Srew M5 Wing nut M5 die washer 0.8mm and 0.3mm You can assemble the star locater optimized for left-hander or right-hander. Be careful when you read the degree. The right degree is which line right-angled to the grip. Place the plate to 90 degree (vertical to the top) and look to the 90 degree line to become a feeling for the scale. For example the star locater is placed to 50 degree on the photo. You can use the star locater to search a star or you can measure the degree between you and the star.