Universal diamond core drill bits UDKB 52x420xUNC 1 1/4 art.no. 181020, diameter (mm): 52. Laser-welded on fully automatic welding machines for consistently high quality of the welded joint. High-temperature resistant even under extreme temperature loads, no brazing of the segments due to overheating. Universally applicable for dry and wet drilling, hand-held or with drill stand. Uniform connection thread UNC 1¼ inside. Drilling depth 420 mm. Diamond segments with wedge-shaped cut ("roof shape") for fast, easy and quiet spot drilling. Specially developed, high-quality diamond segments with high diamond content and special bond, for excellent drilling performance and particularly long service life. Ideal for universal use in reinforced concrete and masonry. Driven by all REMS Picus power tools and suitable power tools of other makes with UNC 1¼ external connection thread.