Hard hat and welding helmet system uses exclusive pivot mechanism so helmet nests over hard hat when raised. Low center-of-gravity helps to reduce neck strain and make it easier to move around. Auto-darkening filter 9002X handles stick, MIG and TIG. Benefits Pivot mechanism allows helmet to nest over the hard hat Low center-of-gravity improves balance of helmet Ratcheting headband 2.13 x 4.09 in. viewing area