Tungsten Carbide Grit Edge Hole Saw and Accessories Carbide Hole Saws for Concrete and Drywall Carbide Hole Saw Tungsten Carbide Grit Edge. Serrated Edged Teeth Hole Saw Capable of Drilling Concrete Drywall Brick and most Masonry Products. No Teeth to Dull and Bind. Must be used with Hammer Drill and TCT Tipped Pilot Drill. Hole Saw Arbors with TCT Pilot Drills Are Suitable for These Size Carbide Hole Saw Hole Saw Arbors / Mandrels Suitable for use with Larger Carbide Grit Hole Saws have Tungsten Carbide Tipped / Masonry Pilot Drills which can be swapped out for High Speed Steel Pilots if you use them on non Masonry Products Later. 7/16 Hex End Asin: B08NT2P715 OR SDS Plus End ASIN: B08NHMWY9S 7/16" Hex Female to 7/16" Hex Male 12" Hole Saw Arbor Extension 7/16" Hexagonol Ended Hole Saw Arbor / Mandrel Extension is Suitable with any 7/16" Hex End Arbor - Extends Drilling Capabilities an extra 12" Deep. Fits any regular 1/2" wide opening Drill Chuck. ASIN B08NHB1T2R 7/16" Hex Female to SDS Plus Male 12" Hole Saw Arbor Extension The SDS Plus Male end of this Arbor / Mandrel Extension Means this Arbor must be used with an SDS Plus Type Drill. The Female end that Connexts to the Hole Saw Arbor is a 7/16" Hex End so the Hole Saw Arbor must Also have a 7/16" Hex End - Extends Drilling Capabilities an extra 12" Deep. Fits SDS Drill Chuck Only. ASIN B09S8MHFN2 Tungsten Carbide Hole Saws Material Cutting Holes in Cement Block Must use Hammer Drill and Must use TCT Pilot Drill for all Masonry Products. Holes in Concrete Pavers Block and Coping For Deep Holes Break Core out when Hole saw bottoms at 1 1/4" Deep, this allows Hole Saw to continue. Regularly check for TCT Pilot Drill not worked loose, a loose pilot will prevent the hole saw from cutting. Cut Hardie Board Drywall Marble Slate Cement Board Drywall Pilot Drill can be replaced and or swapped out for a HSS Pilot Drill if Drilling non Masonry Products like Plywood. TCT Pilot Drills are only for Masonry Products. Serrated Teeth Covered with Tungsten Carbide Grit Can be used with SDS Plus or Hex Arbors.