Coupling sleeves manufacturers india, coupling sleeves, other name is coupling, when using rock drills with male shank adapters and a conventional drifter rod, a coupling is required to join the adapter to the rod, ensuring the ends touch for efficient energy transmission. Coupling sleeves are also used to connect several rods to each other in the same way. Couplings sleeves have a middle stop to prevent over-threading on to the drill rod. Shank adapters are manufactured from specially selected alloy steels followed by heat treatment through carbonizing which withstands the high impact power of drilling. This product line has been recently introduced by mindrill and the quality is highly appreciated by the end users. Presently we maintain stock of few selected fast moving categories but we can undertake manufacturing of the same as per customers requirement, if quantity permits.