Drill Crown Holder Silver SDS Plus 450 mm EX450

Silver SDS Plus crown holder EX450 is a 450 mm long accessory designed to connect core bits and crowns to SDS Plus rotary hammer drills. It provides extended reach for drilling in masonry and concrete where standard-length holders are insufficient. The holder offers a direct SDS Plus connection and a robust shaft intended for heavier-duty drilling tasks that require stability and alignment over a longer working distance.

Advantages

The 450 mm length reduces the need for extensions or ladder repositioning by allowing deeper or hard-to-reach drilling from a single stance. Its SDS Plus compatibility ensures secure engagement with standard SDS Plus chucks and quick bit changes. The design emphasizes rigidity and alignment to reduce wobble when using core bits, contributing to more precise hole placement. The metal construction supports repeated professional use and higher load during continuous drilling.

Suitable for

• Drilling deep holes in concrete and masonry with core bits
• Jobs requiring extended reach, such as overhead or recessed drilling
• Professional and DIY applications where SDS Plus rotary hammers are used

Key specifications

• Shank type: SDS Plus compatible shank for direct rotary hammer connection
• Overall length: 450 mm for extended reach
• Material: metal construction for strength and durability
• Intended use: mounting and securing core bits and crowns for masonry and concrete drilling

How to use

Insert the SDS Plus shank of the crown holder into the drill’s SDS Plus chuck until it locks in place. Mount the core bit or crown onto the holder following the bit manufacturer’s mounting procedure and secure it properly. Operate the rotary hammer at appropriate speed and hammer settings for the diameter and material being drilled, keeping steady pressure and alignment to avoid side loads. Periodically inspect the holder and bit connection for wear or loosening during prolonged work.

Usage recommendations

Use appropriate personal protective equipment including eye and ear protection. Select a core bit rated for concrete or masonry and match the drilling parameters to the bit diameter. For extended or overhead drilling, ensure stable stance or use support equipment to maintain alignment and reduce operator fatigue.