Bosch GT300 1/4 Inch Glass Tile Drill Bit 3-pack Carbide

Product Description

The ROBERT BOSCH TOOL GROUP GT300 is a 1/4-inch carbide-tipped drill bit engineered for clean, controlled drilling through glass and tile. The precision-ground tip geometry eliminates bit wander and bit walking at the start of the drill cycle, reducing the risk of cracked or chipped material. The reinforced carbide head resists tip cracking under load and extends service life compared to standard masonry bits. The 3-flat shank design locks securely in most drill chucks to prevent slippage during operation. This bit ships as a 3-pack, making it practical for job sites and service vans where backup tooling matters.

The GT300 is suited for tile installers, remodelers, plumbers, and electricians who need to penetrate glazed tile, ceramic, porcelain, or glass surfaces during fixture installation, rough-in work, or finish trim. Typical applications include drilling through wall tile for supply line penetrations, drain fitting locations, electrical box cutouts, and accessory anchor points. The innovative flute geometry allows the bit to cut faster than conventional spade-profile glass bits, reducing heat buildup and improving hole quality in hard, brittle substrates.

Key Features

• Precision tip eliminates bit wander and walking at drill entry
• High-quality carbide tip with reinforced head resists cracking and extends bit life
• 3-flat shank prevents rotation and slippage in drill chuck
• Innovative geometry promotes faster cutting with less heat buildup
• Sold as a 3-pack for job site backup availability

Compatibility

Designed for use with standard 3-jaw drill chucks accepting 1/4-inch shanks; suitable for drilling glass, glazed tile, ceramic, and porcelain surfaces.

Installation Notes

Tile and glass drilling should be performed by the appropriate trade at low-to-medium drill speed with steady, even pressure to avoid substrate cracking. Use water or a cutting fluid to manage heat when drilling through dense porcelain or thick glass. Secure the workpiece firmly before drilling and avoid side-loading the bit. Always wear appropriate eye protection when drilling brittle materials.