SHDIATOOL Diamond Core Drill Bits 1-3/8 inch (35mm) – Laser Welded, Dry or Wet Drilling for Granite, Marble, Concrete, Brick

Overview

Meet the SHDIATOOL Diamond Core Drill Bits in a 1-3/8 inch diameter (35mm). Built with laser welded diamond segments, these bits are designed to deliver steady performance through hard stone and masonry tasks. The compact 100mm overall length and a standard 5/8-11 thread fit many common angle grinders, enabling straightforward setup without specialized tooling. You can drill dry for quick holes on dry surfaces or opt for wet drilling to manage heat and potentially extend the life of the cutting segments.

Both dry and wet drilling modes offer controlled cuts with minimal wobble when guided with steady pressure and consistent rotation. The robust construction helps maintain edge integrity across multiple holes, making these bits a practical choice for professional projects and serious DIY work.

Key features

• Laser welded diamond core bits for reliable, long-lasting cutting edges
• Diameter 35mm (1-3/8 inch), total length 100mm, thread 5/8-11
• Dry drilling or wet drilling to suit your material and site conditions
• Designed for hard granite, marble, engineered stone, concrete, and brick
• Compatible with 5/8-11 angle grinders; adapters may be needed for SDS, hex, or round shanks

Materials you can work on

• Granite
• Marble
• Engineering stone
• Concrete
• Brick

Usage and care

• For best results, use water cooling when drilling hard materials to manage heat and reduce dust
• Maintain a steady feed and avoid excessive side pressure to preserve the bit’s integrity
• If drilling dry, keep a moderate pace to minimize overheating the segments
• Check shank compatibility; you may need adapters for SDS, hex, or rounded shanks

Real-world use scenarios include creating clean entry holes for conduits, anchors, or plumbing through concrete, brick, and stone. The combination of 35mm diameter, 100mm length, and a standard 5/8-11 thread makes these bits a versatile option for both professional settings and ambitious DIY projects. While results can vary with material and setup, the laser welded construction and dual-use capability offer flexibility for masonry tasks.