Hilti DD-BL-ET 300 Core Bit Extension

The Hilti DD-BL-ET 300 Core Bit Extension (#305903) is designed to increase the drilling depth of compatible Hilti DD-BL diamond core bits. Built from high-strength steel for demanding jobsite conditions, this extension delivers a secure connection while maintaining drilling accuracy and stability.

With a 300 mm (approximately 12 in.) extension length, it is ideal for applications requiring deeper core holes without sacrificing performance or reliability.

Key Features

• Genuine Hilti DD-BL-ET 300 core bit extension
• Hilti Part Number: 305903
• 300 mm (approximately 12 in.) extension length
• Designed for compatible Hilti DD-BL diamond core bits
• Heavy-duty steel construction for extended service life
• Provides a secure, rigid connection for deep drilling applications
• Engineered for professional concrete coring operations

Construction Details

Manufactured from precision-machined, high-strength steel to withstand the high torque and demanding conditions encountered during diamond coring.

The rigid extension design helps maintain alignment between the core bit and drilling system for accurate hole placement.

Designed specifically for use within the Hilti DD-BL coring system to ensure dependable performance and compatibility.

Important Notes

Compatible only with Hilti DD-BL core bits and matching drilling equipment.

Always verify compatibility with your Hilti drilling system before ordering.

Core bit and drilling machine sold separately.

Compatible Equipment