For Use with Tensioning OPGW and Other Aerial Conductors Used in the Telecom Industry, Electric Utility, and Line Construction Industry. 4 BOLT POCKETBOOK GRIPThe NEW Self-Closing 4 Bolt OPGW Pocketbook Grips from GMP Tools. For Use with Tensioning OPGW and Other Aerial Conductors Used in the Telecom Industry, Electric Utility, and Line Construction Industry. 4 Bolt Pocketbook Grips 6 BOLT POCKETBOOK GRIPThe NEW Self-Closing 6 Bolt OPGW Pocketbook Grips from GMP Tools. For Use with Tensioning OPGW and Other Aerial Conductors Used in the Telecom Industry, Electric Utility, and Line Construction Industry. 6 Bolt Pocketbook Grips