The COLBOR NB3.58 3.58" NATO extension bar is equipped with four 3/8" screw holes and three 1/4 screw holes for secure attachment to photography products. It is designed to be used in conjunction with the COLBOR NQD1 quick release accessory, achieving modular stacking of COLBOR CL series video lights in the horizontal direction. Using the 3/8" and 1/4" screw ports, all the COLBOR lights can be attached to tripods, stabilizers, and other photographic accessories with matching screw ports.