Insty Bit 82603 Quick Change Taper Drill Countersink Set
3-Piece Taper Drill Countersink Set includes taper bits and 4-flute countersinks for #6, #8 and #10 screws. Wrench for adjusting countersink included.
Great aid in the shop
Posted by W.Potter on 23rd Dec 2013
Have used these for years and very happy with them. Just needed a replacement bit and some more as a gift. Only slight negative is that the countersink tends to load up with some woods and needs to be cleared. Luckily I found your site on Amazon which did not carry everything I needed. Delivery was quick as promised.
First tapered countersink bits I have owned.
Posted by Grego on 20th Dec 2013
When I got these in I tried them on some really hard white oak. I screwed two 3"x6" pieces together at a 90 deg and it made a really good joint, very tough. Screws were easy to flush out and hold extremely tight.