Armeg 300mm Hole Saw Extension Bar 11mm Hex Shank | CHEXT300L

The Armeg CHEXT300L 300mm Hole Saw Extension Bar is designed to extend the reach of hex shank hole saw arbors, making it ideal for deep drilling and hard-to-access locations. Built from high-quality, fully heat-treated steel, it delivers strength, durability, and reliable performance on demanding site work.

Featuring an 11mm (7/16″) hex shank, the extension securely connects to compatible hex shank arbors using a grub screw fixing system. For even greater reach, multiple extension bars can be coupled together where required.

Manufactured in Britain, this is a dependable accessory for professional installers using hole saw systems across electrical, plumbing, and construction applications.

Features

• 300mm Extension Length – Increases hole saw reach
• For Hex Shank Arbors Only – Designed for hexagon shanked hole saw arbors
• 11mm (7/16″) Hex Shank – Secure drill chuck grip
• Grub Screw Fixing – Strong, positive arbor connection
• Heat-Treated Steel – High durability and long service life
• Stackable Extensions – Can be doubled up for extra reach
• Made in Britain – Trade-quality manufacturing

• Product Code: CHEXT300L
• Product Type: Hole saw extension bar
• Length: 300mm
• Shank Type: Hex
• Shank Size: 11mm (7/16″)
• Compatibility: Hex shank hole saw arbors only
• Material: Fully heat-treated steel
• Fixing Method: Grub screw clamp
• Country of Manufacture: Britain
• Brand: Armeg

Installation Notes (User Guidance)

• Use only with hexagon shanked hole saw arbors
• Insert arbor fully into the extension bar socket
• Align a flat of the arbor shank with the grub screw hole
• Tighten the grub screw firmly onto the flat
• Check grub screw tightness periodically during use
• Multiple extensions may be combined for longer reach

Typical Applications

• Deep wall drilling
• Thick masonry and timber sections
• Service void access
• Retrofit and remedial works
• Hard-to-reach drilling positions