*KeyFeatures *MAIN PARAMETER- Ball diameter: 78 mm (3 inch); Height: 85 mm (3.34 inch); Max. Opening: 54 mm (2.13 inch); Base diameter: 98 mm (3.85 inch). *EXCELLENT QUALITY- Full set standard block ball vise engraving tool: This block is made of solid galvanized steel, come with 30pcs attachment and 3-inch diameter ball; it has outstanding quality and value. *SELF-CENTERING JAW SYSTEM- The mini ball vise has a self-centering jaw system made for stone setting, small engravings, and other precision work. *ROTATIONAL BRAKE SYSTEM- The internal rotational brake system lets the user choose the amount of rotational resistance from free to locked. There is a double ball bearing system for smooth rotation without looseness or wear inside. *WIDE APPLICATION- The engraving ball vise is perfect for stone setting, small engravings, and other precision work. Designed for a unique combination of solid work support in a small and maneuverable size. Its low profile is suited for microscope work. ******************************************************************************************************* *Specifications Product: Ball vise Material: Galvanized steel Ball diameter: 78 mm (3 inches) Height: 85 mm (3.34 inch) Max. Opening: 54 mm (2.13 inch) Base diameter: 98 mm (3.85 inch) Package size: 20x14x11 cm (7.87x5.51x4.33 inch) Gross weight: 2.17 kg (4.78 lbs) ******************************************************************************************************* *Pakcage Content 1 x Full Set Standard Block Ball Vise Engraving Setting Tool