ROCKLER JIG IT Undermount Drilling Guide – Durable ABS with Steel Inserts for Blum Tandem Plus

Effortless, precise holes for Blum Tandem Plus undermount slides

The ROCKLER JIG IT Undermount Drilling Guide is a purpose-built tool designed to streamline the installation of concealed drawer slides. Crafted from durable ABS plastic and reinforced with steel inserts, it stands up to regular workshop use while helping you maintain accurate, repeatable hole placement. This guide is especially helpful when you’re mounting Blum Tandem Plus slides, ensuring your drawer boxes align cleanly with the cabinet front for a confident, professional fit.

With a focus on controlled angles and depths, the guide aids in drilling six precise holes per drawer box, aligned with front corners to create the required angled openings for locking devices. The built-in angled drill guide supports consistent depths, reducing drift and variance across multiple holes. The result is a clean, flush install that looks and performs as intended.

Included kit and core features

• Sturdy ABS drill guide with steel inserts for long-term accuracy
• 6 mm and 2.5 mm brad point drill bits for common drawer hardware
• 6 mm and 2.5 mm stop collars to control drilling depth
• Hex wrench for quick adjustments and setup
• Designed to work seamlessly with Blum Tandem Plus drawer slides

Why you might choose this drill guide

• Precise hole placement helps ensure a tight, flush drawer box fit
• Integrated 15° angled pilot holes support reliable lock and rear hook alignment
• Front corner alignment simplifies the drilling process and improves repeatability
• Complete kit cuts setup time, so you can move from marking to mounting faster

Whether you’re upgrading an existing project or building new cabinetry, this drill guide offers a practical balance of rugged construction and thoughtful design. It presents a tangible workflow improvement—supporting accuracy without demanding additional tools, while remaining easy to set up and use. The result is an installation experience that feels professional and predictable, inviting you to focus on the details that matter in project finishing.