Holder Size - 58mm x 28mm x 28mm. Holder Size - 58mm x 28mm x 28mm (2). THIS QUICK CHANGE SET COMES COMPLETE WITH. 1 x Mounting Block 37 mm high 7/16' mounting bore. Fits straight on your myford lathe. 2 X Standard Holder for tools upto 12mm, suitable spanner. 4pc - A Superb 4pc quick change toolpost "dixon type" to fit myford ML7 and SUPER 7 lathes. All parts are hardened and ground, set of five pieces- the toolpost Block. 2 standard holders and 1 vee holder for boring. Main block 2 1/4 " square, 1 1/2" high. Set comes complete with 3 standard holders + 1 Boring Vee Holder + 1 Hex ...