Description:  20pcs Parallel Base Set Machine Tool Parallel Pad Block Vises Parallel Iron Plate.     Specification:  Material: steel.  Accuracy: 0.0002 Inch.  Quantity: 20pcs (10 pairs, 2 for each pair).  Hole Size: Tolerance of size.  1/8"x1/2"x6": 13/64".  ZT04-08:  1/8"x5/8"x6": 1/4".  1/8"x3/4"x6": 5/16".  1/8"x7/8"x6": 5/16".  1/8"x1"x6": 5/16".  1/8"x1-1/8"x6": 3/8".  1/8"x1-1/4"x6": 3/8".  1/8"x1-3/8"x6": 7/16".  1/8"x1-1/2"x6": 1/2".  1/8"x1-5/8"x6": 1/2".     Features:  Ideal for different uses with vice, milling machine and lathe.  High-precision manufactured parallel pads.  With a practical storage box for easy carrying.  Additional embossed lettering of each parallel pad for easier using.     Package Included:  10 set x parallel pads (20pcs) 1 x Storage Box