7.78-15.74 40 Position Quick Change Tool Post CNC. QUICK CHANGE TOOL POST CATEGORY. Quick Change Tool Posts. QUICK CHANGE TOOL POST SERIES. QUICK CHANGE TOOL POST TYPE. Forged steel band with cam-locking top handle rigidly locks and quickly release tool holder. 40-Position dial (every 9) with marker. Ideal for multiple-operation jobs in toolroom and for tracer work. Precision machined high quality forged chrome steel. Hardened and ground splines. 1 x 4 H E Series Boring Bar Holder.