Expandable storage box made of plastic containing 5 Heller ProXtreme concrete/stone drill bits: 4, 5, 6, 8, and 10 mm. The ProXtreme concrete drill features a 3-flat "Tri" shank and is designed for extreme demands in concrete and natural stone.

The Heller ProXtreme concrete drill impresses with its maximum lifespan, excellent drilling behavior, and strong performance. The optimal head geometry and large-volume spiral design allow for very high drilling speeds. Thanks to the ground carbide plate and high-strength head soldering, the ProXtreme is suitable for a wide range of applications. Additionally, the jet technology used by Heller ensures extremely good performance characteristics and high break resistance.

• Strong. Durable. Comfortable: The all-rounder for concrete and all natural stones with superior performance
• Maximum lifespan and excellent drilling behavior
• 3-flat "Tri" shank prevents slipping in the chuck
• Wide range of applications and perfect centering thanks to the ground carbide plate and high-strength head soldering
• Specifically designed for demanding drilling tasks, e.g., in concrete, granite, marble, and hollow bricks
• Extremely high speed due to optimal head geometry and large-volume spiral design
• Heller jet technology ensures extreme performance characteristics and break resistance
• Suitable for hammer drilling and also usable in rotary mode

Contents:
∅ 4 x 45/115 mm
∅ 5 x 50/115 mm
∅ 6 x 60/125 mm
∅ 8 x 80/145 mm
∅ 10 x 80/145 mm.