Precision Screwless ViseFeatures:Hardened and stabilized Precision ground to a mirror finish Simple operation and extremely versatile Squareness and parallelism are approx. ±0.0002" on critical sides ItemDescription0235-0302ize:2",Total Length:5.51",Total Ht.:1.96",Jaw Opening:2.56"0235-0303Size:3",Total Length:7.48",Total Ht.:2.75",Jaw Opening:3.93"0235-0304Size:4",Total Length:9.64",Total Ht.:3.54",Jaw Opening:4.92"