Tracer ALH1 are 2B graphite replacement refills designed for use with Tracer Deep Hole pencils. The 120 mm length allows easy marking in hard-to-reach areas and deep holes, while the 2B graphite quality provides clear and precise writing. The new shockproof case effectively protects the refills during transport and work on the jobsite. These refills are an ideal solution for professional craftsmen and builders.