Check the listing for details. Starrett 568C V-Blocks & Clamps. Condition: New. Listed at 630.00 USD. Visit My eBay Store: discount_tool Starrett568C V-Blocks & ClampsHardened 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 Deg and 90 Deg to hold either square or round workStepped groove construction permits high or low clamp mounting or small or large 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 50mm)**may have different serial / lot # than the picture PLEASE NOTE: WE ARE CLOSED ON SATURDAYS & SUNDAYS AND THEREFORE MAY NOT ALWAYS RESPOND TO OFFERS.