If you do any machining in your workshop, especially on smaller workpieces, you need the ABN Machinist Thin Parallel Bars 20-Piece Tool Set 1/8” x 6” Inch – Straightedge Bar Blocks – 1/2" to 1-5/8” Block Pairs for millwork on your jig or drill press. This package includes (2) 1/8” x 1/2” x 6”, (2) 1/8” x 5/8” x 6”, (2) 1/8” x 3/4" x 6”, (2) 1/8” x 7/8” x 6”, (2) 1/8” x 1” x 6”, (2) 1/8” x 1-1/8” x 6”, (2) 1/8” x 1-1/4” x 6”, (2) 1/8” x 1-3/8” x 6”, (2) 1/8” x 1-1/2” x 6”, and (2) 1/8” x 1-5/8” x 6” parallel bars. The sizes are permanently etched on each parallel for easy identification. They are made from solid steel and come individually wrapped (in pairs) and pre-oiled for rust-resistance. This package contains 20 parallel bars (2 of each size) and 1 storage case for your convenience. WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.