<b>90-day free replacement guaranteed for the grinder and its accessories. If there is any problem, please contact seller first and we will offer the best solution to solve the problem. <br> Besides, the flex shaft is consumables but it can be replaced easily. You can replace it on you own and it won't affect the grinder normal use. We have flex shaft replacement part individually on sale. </b><br><br><b>Flexible Shaft Grinder Carver Rotary Tool Features: </b><br> Load Power: 780W <br> Chuck range: 0.4-6mm<br> There is a screw on the pedal to adjust the constant speed and rotating speed<br> Multi-use rotary tool for cutting, sanding, polishing, drilling, burr removal and more<br> Electronic pedals design ensure safety and prevent heat and leakage of electricity. <br> Metal Flexible shaft features good extension for precision work. Soft, durable and heat-resistant, ensures long lasting service time.<br> <br> <b>Pakcage list:</b> <br> 1x Chuck key <br> 2x Carbon brush <br> 8x Sanding bands <br> 6x Sanding disc <br> 9x Grinding heads <br> 2x Sanding tape connect rod <br> 1x Slice rod <br> 1x Flex Shaft Grinder <br> <br> <br><b>Note: Our package included accessories is a simple set. If you want to grind/carve different materials, you need to get more accessories by yourself according to your need. Thanks for your understanding.<br><br><b>Why we choose Plastic Material Foot Pedal</b> Steel material may vary the speed more obvious, but steel material will conduct heat and easily hurt user. After Exploring many times, we decide use plastic.<br><br><b>Note: The speed control range depends on user experience and "feeling". Thank you for your understanding.</b><br><b> If the foot pedal adjustable speed is not obvious, we highly suggest that you can adjust the screw (at the back of the peddle), to let it loose a little back outside to have a try.