Inventions and accessories specially adapted for use in rock drilling and blasting being equipment used in the protection, placement and locating of explosives in boreholes and the like, namely, Drill hole and blast hole consumables for open pit and underground mines, inflatable bladders, inflatable plugs for bore holes / blast holes, Blast hole void filling bags, mechanical plugs for use in a borehole / blast hole, In hole Brush retention plug, Drill hole cones, Bore hole stabilizer, In hole retainer, Foam plugs, hole saving devices, Liners for lining a bore hole /blast hole, hole lining materials and bore hole liners, hole lining tubes, Bore hole plugs including inflatable bladders, fluid delivery hoses for effecting inflation and deflation of said inflatable bladders, pressurised fluid packs including aerosol packs for use with said inflatable bladders, control mechanisms for use with aerosol packs, lead protectors, booster protectors, heat protectors; all of the aforementioned being for use in drilling and blasting activities