Cutting down to size. Replacing the cutting line on your Sun Joe® Shredder Joe SDJ616 electric leaf mulcher/shredder is easy with the SDJ616L handy pack of 20 pre-cut replacement strips. When you notice a decrease in your shredder?s cutting performance simply remove the worn line and feed the new pre-cut line in its place to resume shredding at optimal efficiency. Constructed of durable nylon these 0.1 in. x 12.6 in. (0.25 cm x 32 cm) pre-cut strips deliver tough safe and reliable mulching without having to mess with dangerous cutting blades. Easy to install and designed to work specifically with the SDJ616 model these handy replacement strips will keep your Shredder Joe in tip-top shape so it will be ready willing and able to take on all your yard waste and cut it down to 1/16th its original size. Now that?s mulching efficiency!