The Haltec Lock-On Core Tool is a locksmith tool used to remove and install lock cores. It features a universal design that works with most lock brands including Schlage, Falcon, Arrow, Best, and more. The tool has a comfortable grip handle and includes 3 different sized tips to accommodate different lock cores. It allows locksmiths to easily remove and install lock cylinders without damaging the lock body. The tool is made from hardened steel for durability. Overall, this is a versatile lock core installation and removal tool suitable for professional locksmiths.