Breaking-In Tools : The following may be classified as breaking-in tools: large axe, shears, cold chisels, crowbars, hammers, bolt croppers, padlock removers, door breakers, persuaders, levers and wedges of all kinds
H. J. Porter (Chairman - Technical Committee), Dictionary of Fire Technology, The Institution of Fire Engineers, The Victory Press (Leicester) Ltd. 1979 UK. (Fr Tech - Brit) {81}