Easywisdom 100PCS 3/4" (20mm) Black Contoured Side Release Plastic Buckles with A Push Switch for Backpack+ Free Cable Tie Package includes 100 pcs 3/4" (20mm) buckles.Designed for 3/4" belt. Great for hundreds of uses belts, backpacks, straps and much more Upset: strong toughnessmaking of environmental protection material Dimensions: 1.75" x 0.38" x 1" There is a push switch on the buckle and It determines whether you can unlock buttons or not.