Amana Tool Shankless Counterbore with Slow Spiral Drill Option:55143 - #24 Screw 1 Dia x 3/8 Drill Dia x 3/8 Drill Shank A unique heat treatment process

A unique heat treatment process strengthens the chisel for impact resistance and stability

burr-free cuts for virtually no rework

Brushed brass sleeve on bottom

Whether you're building a deck

3-1/2" x 3-1/2" square top

Amana Tool Shankless Counterbore with Slow Spiral Drill Option:55143 - #24 Screw 1 Dia x 3/8 Drill Dia x 3/8 Drill Shank A unique heat treatment processAvailable 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