's QC has Front pin lock technology. Available for: EC480E, EC380E, ECR355E, EC350E, EC300E HYBRID, EC300E, EC250E, ECR235E, EC220E, EC200E, EC160E, ECR145E, EC140E. Details. Steelwrist Symmetrical quick coupler. Fits the S60 or S70 attachment interfaces only. It is a good choice for work requiring high performance and the need to easily ...