As indispensable as gaffer tape is cinefoil. I have some clips that are 2 clips attached and swivel independently so can make barn doors out of cinefoil. It is reuseable. I also use C47's, clothes pins with the spring to attach gels and cinefoil to light reflectors. Turn the 2 wooden pieces around and you have a C74. Had a gaffer mess with me in my early days after explaining the correct way to coil extension cords he first ask I fetch a c47. When I didn't know and asked what it was, he explained what it was. Then he asked I fetch a butfer. He responded, pooping. A little gaffer humor.