Heller Tools manufactures the ProXtreme 28253 6 Carbide metal concrete twist drill bit, which features an 8 mm diameter and a total length of 145 mm. This drill bit, designed with a triangular shank, is ideal for drilling into stone, masonry, and brickwork. It is particularly suited for heavy-duty applications in concrete. https://elecena.pl/product/28930170/heller-28253-proxtreme-concrete-drill-bit-8mm-145mm-triangular-shank 2025-06-10 https://elecena.pl/product/28930170/heller-28253-proxtreme-concrete-drill-bit-8mm-145mm-triangular-shank 2026-07-11