Diamond Core Drill Extension Bars | BSP & UNC – Rennie Tool

Our Rennie Tool diamond core drill extension bars are designed to give you extra reach when drilling, available in both 1/2″ BSP and 1.1/4″ UNC fittings. With lengths ranging from 100mm to 450mm, these extension bars are ideal for extending the depth capacity of your core drilling setup.

Manufactured from high-strength materials, they deliver a secure connection and long service life, whether used in wet or dry diamond drilling applications. Easy to fit and engineered for reliability, Rennie Tool extension bars are trusted by tradespeople across construction, plumbing, and electrical work.