4-Size Combination + Full Set of Accessories to Meet Multi-Scene DIY Needs: Includes 4 common sizes (1", 3/4", 1/4", 1/8") and 4 matching Allen wrenches, no additional purchase required, easily suitable for grinding and drilling of stained glass, tiles, and stone Titanium Coating + 118° Split Point for High Efficiency, Wear Resistance and Convenience: Titanium coating reduces friction and lowers temperature to extend tool life; 118° split point design prevents slipping, increases cutting efficiency by 30% (compared to ordinary drill bits), and is easy for beginners to use Brass Core + Double Diamond Plating to Solve Shaft Jamming Problem: Brass core structure reduces shaft adhesion and is compatible with most brands of glass grinders; double diamond plating on the surface enhances hardness, ensuring no easy wear even with repeated use, and core performance is far superior to ordinary chrome-plated drill bits Standard 8mm Hole Diameter for Professional Compatibility + High-Efficiency Grinding: Unified 8mm (0.31in) hole diameter, compatible with mainstream grinder spindles; drill bit models correspond to MCB01/MCB34/MCB14/MCB18, accurately matching different grinding needs and improving work efficiency Suitable for Multiple Materials, the First Choice for Cost-Effectiveness: Applicable to hard materials such as glass, stained glass, tiles, and stone, suitable for both home DIY and professional decoration; Premium 4-Pack Diamond Grinder Bits – Titanium Coated for Stained Glass Drilling & Grinding

Core Performance Upgrade

118° Split Point: Prevents slipping during drilling, increases cutting efficiency by 30%, and reduces material waste.
Titanium Coating Technology: Lowers friction coefficient, keeps the drill bit cooler during operation, improves durability by 50%, and no frequent replacement is needed.

Safe and Durable Material

Main Body: Brass core structure prevents shaft adhesion, compatible with 99% of brand glass grinders.
Plating Layer: Double diamond plating for high hardness and wear resistance, maintaining sharpness after long-term use.
Surface Treatment: Chrome-plated hardening process for rust and corrosion resistance, extending service life.

Wide Application Scenarios

Home DIY: Stained glass production, glass ornament drilling.
Professional Construction: Tile cutting, stone grinding, ceramic processing.
Compatible Equipment: Works with mainstream brand glass grinders, no additional adaptation accessories required.

Detailed Specifications & Packaging

Sizes: 4 common sizes (1", 3/4", 1/4", 1/8").
Hole Diameter: 8mm/0.31in (standard universal size).
Packaging List: 4 grinder heads + 4 Allen wrenches (full set, ready to use after unboxing).