T63mm QUICK CHANGE TOOL POST STANDARD BORING PARTING HOLDER. This Is A Quality Made Tool-post Set Which Is Fully Hardened & Ground and Manufactured from Alloy Steel. 1 Mounting Block Having Size. L x W x H. 73 x 73 x 63mm. 2 Standard Holder’s Having. 1 Parting Holder For 3/4. Parting Blade Included Of Size: 1/8″ x 3/4″ x 6. 1 Boring Holder With “V” To Support Round Tools. Comes Complete With Spanner. Allen Key Of Size : 4mm. Set Includes : 1 Mounting Block + 2 Standard Holders + 1 Parting Holder+ 1 Vee (Boring) Holder+ 1 Parting Blade + Spanner + Allen key.