Deburrs inside and outside edges of 1/2, 3/4, and 1" thin wall conduitHooded tip tightens EMT fitting set screws without slippingRemovable head interchangable with IDEAL 7-in-1 Twist -a-Nut™ Screwdriver shaft (35-908)Head can be used in drill or cordless screwdriverUniversal Wire-Nut® wrench in handle end eases installation of twist-on connectorsLifetime guarantee (excludes blades)