Why Blue? Suitability Video Demos Use Gripit Blue plasterboard fixings for seriously heavy stuff, this fixing will hold the heaviest of domestic heating boilers - no trouble.. Just one Gripit Blue holds up to 113KG. To install, you will require a 25mm drill bit. Each Gripit Blue is supplied with an M8 X 30mm bolt. Use Gripit Blue for seriously heavy stuff, this fixing will hold the heaviest of domestic heating boilers – no trouble. Gripits are not suitable for Cantilever, extendable, "pull out" or full motion TV Brackets. This type of installation causes immense stress on the plasterboard and tends to result in the plasterboard failing. The only recommended TV Brackets that are compatible with Gripit products or kits are ‘fixed’ wall brackets which allow no movement of the TV whatsoever. Please Note: This fixing is not suitable for Vertical Radiators, for Vertical Radiators Rhinofix is suitable. *Please note: Gripits are not suitable for Cantilever, extendable, "pull out" or full motion TV Brackets. This type of installation causes immense stress on the plasterboard and tends to result in the plasterboard failing. The only recommended TV Brackets that are compatible with Gripit products or kits are ‘fixed’ wall brackets which allow no movement of the TV whatsoever. *Starter kit contains 10 of each coloured Gripit fixing, all screws & bolts plus 1 of each size drill bit. *Do not over tighten, do not use powered drivers to tighten the GripIt.