Working principle:<br /> 1. Release the seal inside the banjo<br /> 2. Pour the compound into it<br /> 3. Start filling the cast iron of the partition<br /> 5. Use big wheels as angles and saw gears as corners<br /><br /> Specification:<br /> Material: high quality PVC and aluminum<br /> Size: 24 × 9.4 × 8.7 inch<br /><br /> The package includes:<br /> Gypsum board seam tool + spatula seam tool<br />