What it does: Extension shaft for angle grinders that lets you reach corners, columns, inner joints and other areas standard grinders cannot access, enabling polishing and grinding in a single pass. Key benefit: Extends reach so you can work safely and efficiently without forcing awkward tool angles or changing machines mid-task. Secure connection: Precision M10 threaded joint ensures a seamless, tight fit. The polished thread seat reduces play and prevents loosening or slipping during rotation. Durable construction: Made from thickened 45 steel for increased strength and long service life. Built to withstand the torque and abrasion of grinding and polishing tasks. Rotatable design: The extension shaft rotates smoothly to allow deep grinding and polishing of inner corners and irregularly shaped stone surfaces. Easy to use: Threaded design makes installation and removal quick and straightforward — attach to any grinder accessory with an M10 thread. Compatibility: M10 threaded connection conforms to common angle grinder accessory standards, allowing use with a wide range of grinding and polishing attachments. Typical applications Stone and masonry finishing: Reach and polish inner corners, column bases, or recessed areas on countertops, stair treads, and stone facades. Detail grinding and polishing: Smooth irregularly shaped stones, sculpted surfaces, and hard-to-reach joints without changing tools. Renovation and repair: Work inside corners and between columns for grout removal, surface leveling, and final polishing. Notes Thread type: M10 precision thread as supplied. Material: 45 steel, thickened and lengthened for durability. Designed for use with angle grinders and compatible accessories using an M10 thread.