Feature? The rotating extension shaft is designed with details and durable quality. The installation method is simple and will not take you too much time. Notched for easy removal with a wrench. Workers use tools optimally. For the local crevices that cannot be thrown away by the edge of the angle grinder or the polishing machine, install the extension rod, and the grinding and polishing can be done in one step. Specific Size: Suit for M10/M14 Thread Length: 65mm/2.55inch,Extendable depth 50mm/2inch Length:80mm/3.15inch,Extendable depth 65mm/2.55inch Length:95mm/3.74inch,Extendable depth 80mm/3.15inch Length:115mm/4.53inch,Extendable depth 100mm/3.93inch Material: high quality 45# steel Package included: 1* Angle Grinder Extension Connecting Rod The seller recommends purchasing a variety of sizes of products! !