Detailed Photos The connecting sleeve is mainly used for the connection between the shank adapter and the drill rod or the drill rod and the extended drill rod. It is typically made of high quality steel and has threads on both ends that allow it to be screwed onto the drill rod. The thread specification at both ends of the Connecting sleeve can be customized according to customer requirements. Welcome to inquiry. Product Name: R22/R38 Custom Threaded Rock Drill Coupling Sleeves for connecting Drilling Rod Connection type: Threaded. Thread sizes: R22, R25, R28, R32, R35, R38, T38, T45, T51 and customized. Our Products: Drill Bits, Drill Rods, Coupling, Shank Adapters etc. Logo & Color Customized as your request. Welcome to inquiry. Production Process Packaging & Shipping Application Company Profile Zezon (Shenzhen) Supply Chain Co., Ltd (A BNMC company) is a one-stop supply chain service base of an important mining and metallurgy group in China. We mainly manufacture and supply rock drilling tools, grinding steel balls, grinding mill liners, electrolytic cathode and anode plates at a high global standard. With 60+ years history, well organized working process and strict ISO quality control system, we have been providing premium quality products and fast response services, thus, trusted by many clients all over the world for many years. One of our workshop Certifications FAQ 1. Q: Are you a manufacturer or trading company? A: We are a professional manufacturer of rock drilling tools. Products including drill bit, tapered bit, button bit, DTH Bit, drill rod, DTH rod, coupling Sleeves, shank adapter, etc. 2. Q: How can I get the after-sale services? A: Free replacement will be provided if any quality problem. 3. Q: How is your quality control? A: We have our own experienced QC Team. There will be strict inspection for every order before shipping out. 4. Q: How long is your delivery time? A: Within five days for the products in stock; regular orders deliver in 20 days. 5. Q: Do you provide samples ? Are they free or extra ? A: Some stock parts are free and you just need to handle shipping fee. Please contact us for details. 6. Q: Methods of Payment A: We offer different payment terms for your choice, including T/T, L/C etc. Any other questions, please feel free to contact us!