61 "Reliable" Try Square 6"/150MM A very useful try square – attractively designed,light and convenient.The blade is hardened,not graduated, and is firmly held by a special bolt and nut permitting the tool to be readily taken apart, if desired, for regrinding the blade and stock. 3020 Toolmakers' Grade St ainless Steel Squares 2-31/32 - 12-1/32"/50-175MM This high quality toolmakers' square is not graduated and offers squareness accuracy to .0002" (0.005mm) for every 6" (150mm). They feature hardened, ground and lapped stainless steel construction on both the blade and the beam. The beam is machined at the inner corner for clearance of burr or dirt. Packed one in a plastic case. 12" square and set of 4 squares shipped in box with fitted foam insert.Wood cases as listed may be purchased separately. 3020-6 61 Squares 3020 Toolmakers' Grade Stainless Steel Squares Squares Only Case Only Size – Length of Blade* Length of Beam Cat. No. EDP Cat. No. EDP in mm in mm 3020-3 12225 951 55153 2-31/32 75 1-31/32 50 3020-4 12226 918 55154 3-31/32 100 2-31/32 75 3020-6 12227 919 55155 5-29/32 150 3-29/32 100 3020-12 12228 20ZZ-12 55156 12-1/32 300 6-7/8 175 3020 Sets Cat. No. EDP Description S3020Z 12229 Complete Set of all 4 Squares * Length of blade from the inner edge of the beam to the end of the blade. 61 "Reliable" Try Square Cat. No. EDP Size – Length of Blade Length of Beam 61 50303 6" (150mm) 3-1/2" (90mm) 278 S quares