"I bought these as I thought the four sizes would cover most of my needs. I already had a 3/8" one when I bought the morticer attachment for my pillar drill but I needed a smaller size for my latest project. So, I can only speak for the 6mm (1/4") chisel so far. It did the job very well and didn't clog up - even through a knot!"
"I`ve been very pleased with this product. So far I`ve used a couple of the mortice chisels and the results have been first class. The only reason I didn`t award 5 stars was that I haven`t had them long enough to report on their reliabilty though I feel there will be no problems there."