Niwaki Sharpening Stone 1000 Is A Fantastic Sharpening Stone Especially Designed For Secateurs, But Also Great For Shears, Topiary Clippers & Other Sharp Stuff.the Concave Edge Follows The Curve Of The Blade Perfectly & It Is Small Enough To Get Into The Tightest Of Spots. You Can Use The 1000 Fine Grit For A Few Minutes Every Week To Keep Your Secateurs In Tip Top Condition & Is The Most Useful Stone For Everyday Sharpening. the Golden Rule With The Niwaki Sharpening Stones Is To Soak Thoroughly Each Time Before Use & Not To Drop Them.niwaki Sharpening Stone 1000 measures 13.1cm X 20mm X 23mmmade In Osaka, Japanweight 136gnb. We Strongly Advise Not Taking Your Secateurs Apart As We Have Found They Never Go Back Together Quite The Same.