Eleiko 2.5 Kg Barbell Competition CollarsEleikos new Competition Collar is the first to be certified by all three strength sports federationsIWF, IPF, and WPPO. The patent pending design features a proprietary TPE ring which compresses and rotates to secure the connection between the bar flange, plates, and collars, reducing wear on plate hubs and dampening noise. Eleikos distinctive 1. 2 knurling on the lever and tightening wheel, along with the sandblasted grip contours, improve the