4 Pair (8 Pcs) 3/16-1/2 x 6 Inch Parallel Set Precision Block Gage Gauge Tool Plastic Case Dimension: 4-5/8 in L x 6-3/4 in W x 2-1/4 in H *Rough Estimation* Weight: 6.85 Pounds *Rough Estimation* Used For Setting Up Work For Drilling And Milling Within 0.0001 Inch Allowance 4 Pairs: 1 Pair 3/16 x 1 x 6 Inch With 5/16 Inch Hole 1 Pair 3/16 x 1-1/4 x 6 Inch With 5/16 Inch Hole 1 Pair 1/2 x 1-1/2 x 6 Inch With 1/2 Inch Hole 1 Pair 1/2 x 1-3/4 x 6 Inch With 1/2 Inch Hole Supplied With Plastic Case When Purchase ( Plastic Case Color May Vary) Qty: 1 Set Light Item