Description of πͺ Woodworker Mortising Mortise CSLU Tool - 16 Inch
Fits more mortising machines and drill press attachments. 1/4-Inch, 5/16-Inch, 3/8-Inch, 9/16-Inch, 5/8-Inch and 1/2-Inch sizes. Made of the highest quality tool steel. High performance flute design geometry for superior chip extraction. Hardness: HRC 48~50.
"Fits all slotters and drill bits" WRONG, had to return because it didn't fit my Delta 14-650 which used a 5/8 mounting ring and this set used a 3/4 delivered is "collars.
There is nothing good in this set. I wish I could say it was me. The chisel head wobbles on the chisel causing the sides to become uneven. There must be a Temkin bearing to ensure smoother operation. The chisel head rests against the drill motor chuck. I had to shorten the Faustner bit's shank by about 1.5 inches to actually make it work the way a plug-in drill is supposed to work. Just not well built, very cheap. I think you get what you pay for.
They are in good condition but the finish is satisfactory. See photo. This was the case with all chisels. All chisels have burrs and uneven cutting surfaces. The center chisel is an example of uneven grinding. One of the chisels had this. The right chisel is an example of grinding before overheating the workpiece. One of the chisels had this. They can be cleaned with a little work, but for the price I don't think I should be surprised by the workmanship.