Buy direct from the UK Manufacturer, cut out the resellers! Save money! For over 20 years, JKS UK LTD has been one of the leading manufacturers of professional diamond cores in the UK and Europe. We are the supplier of choice by many of the professional diamond drilling companies in the UK, trade professionals and groups, as well as resellers who brand our products with their logo’s. The ULTRA cores will offer excellent speed of cut and lifetime in all reinforced concretes, bricks and blockwork - from standard limestone aggregates through to heavily reinforced flint concretes. The Rooftop segment is designed for a fast start. High grade diamonds for fast cutting and lifetime, soft bond matrix for quick diamond release in hard concretes. As a manufacturer, JKS UK torque tests every segment 3 times over the EU recommended level guaranteeing production quality levels over and above imported products.