A great tool for cutting countersinks quickly and effectively by hand. The comfortable 80mm-long plastic handle has a 1/4in hex-drive quick-change system to swap between the three included countersink sizes (12mm, 16mm & 19mm). The countersinks have a multi-flute design for long life and smooth cutting and are made from hardened steel for long-life. When installed the tool measures 135mm overall.
If you have a lot to do, you can use the countersinks in your powered drill but if you're only doing a few, countersinking by hand is a great way to go as it provides much better control than when used in a powered drill to make the result more accurate.