Eight Point Sockets << back to rail solutions 1" Drive Regular Length Bi-Squares Size A inch D2 mm D1 mm L2 mm L1 mm £ Price/Piece 1-1/8 54 58 30 68 20.00 1-1/4 54 61 32 70 20.00 1-5/16 54 65 32 70 22.00 1-3/8 58 66 32 70 22.00 1-1/2 58 73 32 70 25.00 1-5/8 58 78 38 76 28.00 1-11/16 62 84 40 78 30.00 Coach Screw Socket 1" Drive Regular Length Size A inch D2 mm D1 mm L2 mm L1 mm £ Price/Piece 21 x28 60 60 25 60 32.00 Augers 1" Drive Regular Length Size A inch D2 mm D1 mm L2 mm L1 mm £ Price/Piece 3/8 55 35 - 105 79.00