How big is the slingshot hole processed with 1745 rubber band?

4.46 mm. 1745 rubber-band slingshot refers to the rubber-band outer diameter of the slingshot, and the card hole is 4.46 mm. Slingshot was popular in 1970s and 1980s. Is the wooden slingshot a cold weapon or an entertainment tool? Slingshot generally consists of three parts: wooden bow frame, rubber band and leather bag. The strength of the slingshot depends on the tension and rebound speed of the rubber band. The greater the tension of the rubber band, the heavier the projectile that can be matched. The faster the elastic band rebounds, the greater the strength.