New GRS Standard Block With 30 Attachments. This is a new GRS standard block with 30 piece attachment set. Engraving Blocks, or Ball Vises, are specially designed for handwork including engraving, jewelry making, gunsmithing, wood carving, sculpture, precision assembly, model making, mold & die work and more. These flexible work holders are very stable yet easily maneuvered while you work. Self-centering jaws have tooling holes that accept a variety of pins and attachments. The top half of each vise rotates smoothly about its center. The spherical bottom sits in a socket ring so you can tilt it in any direction. GRS blocks are world-renowned for their smoothness, mechanical integrity and longevity. The GRS Standard Block combines outstanding quality and value. It weighs 19 lbs (8.6 kg) which is 25% heavier than other small blocks. Inside is a double ball bearing system for smooth rotation without looseness or wear. And, a brake that allows you to control the rotational resistance. Both jaws have replaceable threads, another GRS feature. Solid steel is used to make this block. The black jaws and satin chrome finish save your eyes from glare and strain. The GRS Standard Block is a solid, versatile and beautiful vise. It's a great foundation for your work. Includes leather faced ring clamps plus a variety of pins and 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 Specifications: Block weight - 19 lbs (8.6 kg). Ball diameter - 5.12" (130 mm). Jaw width - 2.5" (64 mm). Jaw height - 1.5" (38 mm). Max. opening - 3" (76 mm).