The NEW AND EXCLUSIVE STANLEY® FATMAX® Fixed Blade Trade Knife has a linear ergonomic design to guarantee maximum blade contact for efficient and clean cuts. The hardened steel blade holder is super durable too for ultimate blade retention and accuracy - and thanks to the blade retention magnet, the blade will not fall out. Not only are blade changes therefore quick and easy, but the FATMAX knife also has a coarse thread thumb wheel for fast locking and unlocking.