Like larger GRS vises, the MicroBlock is machined from solid stainless steel and finished with a special low glare treatment to reduce eye strain. It features a self-centering jaw system and an adjustable internal brake system that allows the user to choose the amount of rotational resistance. The MicroBlock's low profile and compact design is especially suited for microscope work or other situations where the size of a larger vise is an obstacle. Includes leather-faced ring clamps plus a variety of pins and other clamps that fit the upper jaw plates of every GRS Block. These 30 pieces help you instantly solve the problems of holding, so you can start working.