The AH165-ZMGE2 16mm dia. series of compact size pushbuttons are 'finger-size', and consequently take up little panel space. In spite of their small size they have a highly reliable mechanism, and are eminently suited for solid state and other electronic circuits. AH165 series contact block holders can easily be removed manually. Moreover, the contact block can be easily attached or detached without using any special tools, thus facilitating addition or replacement of contact.