Karcher 2.642-581.0 Trigger Gun, Quick Connect Karcher genuine a accessory Quick connect style Features child safety trigger lock Compatible with these 2011 models: K 2.29, K 2.425, K 3.350, K 3.450, K 3.48M, K 3.49 M Also K 3.540, K 3.69 M, K 3.690, K 3.740, K 5.540, K 5.68 M, K 5.690, K 5.740, K 5.85 M