D31529 Size: 4-1/2" Features: -C34 Short Dry Laser Welded Bit. -9'' Short Bit is used on hand-held drill for soft to medium concrete. -Use for dry or wet. -Core Travel: 9''. Usage: -Stone. Product Type: -Core Drill Bits. Dry/Wet Use: -Dry/Wet Use. Cutting Depth: -9 - 12 inches. Edge: -Segmented.