If the description says - with pushbutton - then you expect a pushbutton. Unfortunately, this is not available? The slider (? Button) is rigid and can be only the knife back and forth and push the prongs on the guide to keep the knife in position - what they do even passably !!! When, for example: slicing a silicon joint or when cutting cardboard the blade moves in an uncontrolled way !!! To use only for light works on paper !!!
