For Sentro Knitting Machine Special Adapter Production Tool Fast Automatic Knitting Specifications: Only suitable for Sentro 22, for Sentro 40 and for Sentro 48, for Jamit knitting machines. Are you still shaking your for Sentro 22, for Sentro 40 and for Sentro 48, for Jamit knitting machines by hand? Our power adapter for fast knitting will help you knit projects faster. Only applicable to Sentro for 22,for Sentro 40 andfor Sentro 48, for Jamit. Our adapter fits tightly to the crank of your knitting machine, easy to place and disassemble, let go of your hand. Very suitable for beginners to knit their own fashion accessories. Durable tapered design: Please do not use high-speed drills, as it may damage the adapter. We still recommend that you use the power adapter at a medium speed (up to 180 rpm), as these knitting machines are designed for manual operation. Please screw it on your crank with a little force to make it fit your knitting machine. Color: black/white/pink/blue Package contents: 1x crank adapter, 1x ¼” hexagon steel drill bit