4 Pair Steel Parallel Set Hardened Square Precision Gauge Gage 6'' Block Gage Weight: 3.80 Pounds *Rough Estimation* These Precision Parallels Are Recommended For Layout Work, Standards And Set Up The Holes Are Designed For Easier Handling And Set Ups Made Of High Quality Alloy Steel Precision Ground And Hardened All Are 6 Inch Long And 3/16 Inch Wide Or Thick +/- .0003 Inch in Parallelism Paired +/- .0003 Inch in Height Within 0.0001 Inch Allowance Contents Include: 1 Pair 3/16" x 1" with 5/16" Hole; 1 Pair 3/16" x 1-1/4" with 3/8" Hole; 1 Pair 3/16" x 1-1/2" with 7/16" Hole; 1 Pair3/16" x 1-3/4" with 1/2" Hole Supplied With Storage case -Storage case may vary (wooden or plastic) -If storage case is a concern, please contact us first before making the purchase Qty: 1 Light Item