Rail Profile Gauge – SKM1 – For measurement of vertical wear (rail height) and lateral wear on rail. SKM1 – used for railway applications (measurement at 45O to the axis of the rail). SKM2 – used for tramway applications (measurement at 22.5O, 45O, & 67.5O). Weight: 1.3kg. Size: 220 x 70 x 270mm. Solid cast aluminium with magnetic clamps for safe fixing.