Another alternative to the 496, the A-111 is an uninsulated contact pin measures 36mm (1 7/16â¬) and has 1,3cm (1/2") penetration.The A-111 is compatible with both the 26-ES and the 22-E, and its tapered point makes it easier to penetrate into hard surfaces.Can be used on wood up to 5cm (2") thick.