1.Release the metal screw to replace the wet mop heads; 2.Metal handle with vinyl coated. 3.Size: 26*18*2.5cm Mop Clip,mop clamp,metal clamp Cleaning Wet Mop (Cotton Mop)1. Quick change metal mop clamp; 2. Metal handle with vinyl coated ,or wood handle3. Bottom style: Loop end ,so flexibleWeight for choice:12oz,16oz, 22oz or other weight you like4. Packing:24pcs/ctn