Starrett Clamps for Round or Square Work, Steel (52591)

Clamps for Round or Square WorkClamp OnlyHardened steel, precision ground parallel and squareV-grooves are ground central and parallel to the sides and base - perfect alignment in matched pairsClamps have screw holes at 45° and 90° to hold either square or round workClamps do not project over the width of the block, permitting it to be used on the base, ends or sides3/8-16 tapped holes permit mounting blocks on faceplates or angle ironsEach block is 2 1/2" long x 3" wide x 2" high (63 x 75 x 50 mm)Capacity: 2" (50 mm) Dia. Round; 1 7/16" (36 mm) Square (1 9/16" [40 mm] with Screw at Top)