1. applicability: fits cutoff to 0.16 inch thickness on a 3/8 inch mandrel for cutting and threads with small diameter. Suitable for 1/4 inch pin hole products and provides a versatile fit for all your cutting tasks. Experience precision with our mandrel. 2. SAFE MOUNTING SOLUTION: Our cutting disc mounting arbor ensures safety while cutting with the structure of the Chuck type. Soft edges allow for speed cutting precision to ensure a secure fastening solution for your cutting wheel. 3. Tool Compatibility Simplified: Ensure the effortless assembly and disassembly of drill bit rotary tools with this mounting arbor. It fits most grinds and is suitable for a range of tools—the accessory for efficient grinding. 4. CONVENIENT MOUNTING SOLUTION: This threepack of mounting arbors provides a versatile mounting solution for all your cutting needs. With two different types of thread heads, it effortlessly assembles all other types of cutting wheels to ensure seamless drill clamping for most 1/4' drill bits and angle grinders.