Practical conversion adapter designed for modifying 100-type and 125-type angle grinders into grooving machines, ideal for hydropower renovation wall grooving work. Easy to install and convert without complicated modification, perfectly matching conventional angle grinders for quick switching to grooving operation. Made of high-strength durable material, the adapter features stable structure, firm clamping and no shaking during working. Support reducing and special-shaped non-standard size customization to fit different models of angle grinders. Lightweight and portable, suitable for home decoration, hydropower construction and wall slotting projects. Professional cross-border supply, stable quality, wholesale and custom processing are available.