You are purchasing a brand new in box, absolute quality 51mm Laser Welded Diamond core wet drill bit. The laser welded 51mm Diamond core drill bit has standard 1 1/4" UNC shank designed for reinforced concrete, hard brick, block tile and other wet drilling. Brand new Wet use Laser welded Diameter: 51mm Length: 450mm Standard 1 1/4" UNC shank Conical shaped diamond segments for fast easy start Teeth are properly protected during transport Please check the store for other sizes Package Dimension: 52 cm(L) x 60 cm(W) x 55 cm(H) Package Weight: 1.5KG