1.The garden tool sharpener is made of diamond whetstone for durable use, lightweight ABS handle for comfort; Honeycomb surface can sharpen garden implements faster than conventional stones 2.The diamond sharpening stone features double-sides diamond design, coarse 400 grit for quick edge setting, extra fine 600 grit for honing; No oil is needed, just sharpen dry or with water 3.Pocket knife sharpener lightweight, compact, convenient, perfectly fits carring around for outdoor activities. The fan-shaped and folding construction provides great protection to the stones, preventing from damage , folding design fits in the pocket or tool bag, convenient to store and carry around 4.Work sharp knife sharpener due to portable design and lightweight, this camp sharpening stone fits for outdoor activities, camping, garden, kitchen, sports or industries