Amana Tool Shankless Carbide Tipped 82 Degree Shankless Countersink Bits with Slow Spiral Drill Option:55136 - #24 Screw 1 Dia x 3/8 Drill Dia x 3/8 Drill Shank Creates a solid joint in

Creates a solid joint in the material by adding a greater surface for glue

Each bit produces a unique profile on the front of the door and a matching profile on the back that can be removed with a 1/8" kerf saw blade

This bit is used to re-groove door and window frames to allow for insulating inserts to block wind and drafts

These bits cut all frame members face down so variations in stock thickness are not a problem

The profile requires the cut to be made in a single pass

Amana Tool Shankless Carbide Tipped 82 Degree Shankless Countersink Bits with Slow Spiral Drill Option:55136 - #24 Screw 1 Dia x 3/8 Drill Dia x 3/8 Drill Shank Creates a solid joint inAvailable in a wide variety of sizes, complete with slow spiral HSS M2 DIN 338 fully ground drill bit. Excellent for Drilling: Natural Woods Man Made Boards MDF Chipboard Plywood Aluminum Non Ferrous Aluminum Composite Material (ACM) Composites Composite Decking Materials High Density Polyethylene (HDPE) Acrylic Warning: When drilling aluminum ferrous materials, for optimal results and extended tool life use lubricant or air cooling. Make sure the