There are two tooling blocks with clamping units for the cutting heads. The blocks are labeled with both the following BT25-RCE-2040 & 5622 010-01. There are four cutting heads that are included in this lot. 2 of them are brand new, but do not have any part numbers on them. The other two were actually on the tooling blocks, but were removed to make sure that the tooling blocks function. The used cutting heads are both labeled BT25-MCLNR-2532A-12. All the heads appear to utilize CNMG inserts, with the new heads being a smaller size of insert. Shank Diameter : VDI-40 40mm. Other info : It appears that the previous owner of these tools broke off an allen wrench in the adjustment screw for the clamping mechanism. Despite the damage to the one tooling block (see the pictures), the cutting head was able to slide on and off just fine. Also, one of the cutting heads is missing the clamp and differential screw (other one has a clamp with the number 20 on it). Please offer on multiple items to get the best deals!