Today s drill steels meet with a succession of hard percussive blows ranging from 2000 to 3000 blows per minute resulting in comprehensive and tensile ultimate fatigue, Shock wave oblique blows, Stresses. Moreover on the struck surface or the electric drill steel being bent during the operation result in bending stresses. Imc drill steel are conditioned to withstand both fatigue and bending stresses by a specific method which ensures even distribution of the compressive stresses through the layers of the drill steel. Imc drill steel have an unusually superior standard of fatigue power to endure corrosion failure. The special treatments for the imc drill steel ensure protection against rust normal shelf, During usage storage or transportation. Imc ensures the level of craftsmanship in its drill steels by utilizing premium selections and pure material which remains free of porosity and metallurgical defects during manufacture. 7/8 hexagon integral steel series effective length bit diameter series effective length bit diameter mm ft in mm in mm ft in mm in imc, 01 800 2 7 34 3 4/9 imc, 02 800 2 7 40 137/64 1600 5 3 33 1 2/7 1600 5 3 39 117/32 2400 7 10 32 1 1/4 2400 7 10 38 1 1/2 3200 10 6 31 1 2/9 3200 10 6 37 129/64 4000 13 1 30 1/4 4000 13 1 36 127/64 4800 15 9 29 1 1/9 4800 15 9 35 1 3/8