Trend Snappy rotating drill countersink for retrofit to quick change Tool Steel drill countersinks to allow drill and countersink depth to be controlled. Rotating depth stop that can be fitted to 9.5mm and 12.7mm diameter Trend Snappy drill countersinks. Precision chrome ball bearings to allow the ring to rotate freely when desired depth is reached. Free rotating minimises marring of the material. Specially designed clamping bolt to securely hold the stop to the countersink to ensure consistent depth. Large radiused cavity to reduce clogging. Adjustable in height to allow countersunk, or counterbored hole. Not for use with TCT drill countersinks. Diameter Metric: 31.5 Cut Length Metric: 18