C-clamps function by affixing a bolt (the "shaft bolt") to the hardware they are to hold in place, such as through the yoke of a lighting instrument, and securely fastening this bolt to the clamp shaft.
C-clamps function by attaching a bolt (the "shaft bolt") to the hardware they are intended to hold, such as through the yoke of a lighting instrument, and firmly securing this bolt to the clamp shaft.