OM2-615 Grip Scale Slide fits most standard Grip Gages. Replaces Hi-Shear® 1-615. Compatible with Hi-Shear® and other 3/4” wide scales, this tight fitting slide can assist in reading hole depths (sheet thicknesses). Slide is pushed against aircraft surface, then gauge removed from hole for reading.Hi-Lok® Grip Scales from Omega Technologies serve two purposes. The thicker side of the grip scales measure the grip-length of Hi-Lok® and Hi-Lite® pins, Shear Lockbolts, structural screws, and bolts.