Steel Countersink Set (3-Piece)

A:  All are tapered from 1/16” to 1/4 inch

A:  Sizes are 9/64", 11/64" and 18/16"

A:  This counter sink set is manufactured in China.

A:  It made in China, like e everything else in this world

A:  If I remember right they’re made in the USA.  In one of these places Maryland, North Carolina, South Carolina, Tennessee, Kentucky, and Connecticut.   

A:  You will need to screw through both boards. Be careful to use the correct size bit as to the screw size and how far into the top board you countersink the screw head. The screw will make its own threads into the top board as you screw into place.

A:  It really depends on the screw you are using. Technically, these bits are designed for traditional wood screws, which have the same/similar taper as these bits. So they should grab both pieces without splitting the wood. But if you use screws like an all purpose straight screw it will be a different experience with these bits. Depending how long they are, many of those types of screws will have no threads on the first portion of the shank below the screw head anyway so you may not be grabbing the first piece anyway. Another option in these situations is just drill a pilot in the first piece that will show and don't worry as much about the second piece where the screw will grab. That way you don't use the fatter part of the taper. But it really depends on what screw you are using and the material (hard wood, soft, etc.).

A:  Hello HelperBabe Thank you for your contact. We apologize for any trouble or inconvenience in finding information. It would depend on a number of variables. Please reach out to DEWALT directly with this question so that we can give a more precise answer. Best Regards Sherri C DEWALT

A:  Ideally you want the top board to allow it to be pulled tight to the bottom board- threads in top board are not needed (except to keep in alinement ) use the size for the size of screw you are using

A:  #8 1 ¹/2 inch. Using the middle bit for #8 wood screws. I may just need to slide the counter sink up a millimeter or 2 or 3

A:  This would depend on 2 things. First, the size (#8,#10,etc) screw and length of the screw. Second, the bits can be adjusted to the depth needed to match the screw length. When is doubt take some scrap plywood and experiment with different depth settings and screw sizes. Also, are you using wood glue on the joint?

A:  I still use these for drywall screws so I do not split out boards. Like you can with no pre drilling. Just don't go all the way in. And use the smallest bit you can.

A:  The pointed end of a wood screw is tapered (Long Screws have straight shanks) these bits will work for all pilot holes in wood

A:  I use these for all types of screws...they work beautifully!

A:  Yes they are good with any screw. These are very nice bits for wood. Just size it right, meaning don't go too deep or too fat keeping in mind the taper. You can also adjust the depth of the hole. Like if I am making holes in 3/4 ply I will put the countersink way up on the flutes and just pre-drill/countersink the plywood and not worry about pre-drilling the soft 2x4 beneath. I will say I rarely use the large sized bits and on many of the newer fasteners such as GRK or SPAX even they say no pre-drilling needed on the box. For a finish project or any hardwood it is still a good idea to pre-drill. I mostly use a small bit and/or depth I know is too small for the screw just so I know the screw will grab in the right spot while leaving enough wood below for a tight fit.

A:  Yes. There are 3 different sizes so be aware that you are using the appropriate one for the screw. I use this constantly for pre-drilling to avoid splitting the wood.