Rough Rider Mushroom Knife Folding Knife440A Steel. 440A stainless mushroom harvesting blade and ruler (standard and metric). Brown hardwood handles etched with 1 1/2" ruler marked in 3/8" increments. Natural boar's hair bristle mushroom brush stores inside handle when not in use. Specifications for Rough Rider Mushroom Knife: Manufacturer: Rough Rider Closed Length: 5.38 in Blade Material: 440A Knife Application: Folding Blade Handle Material: Hardwood Handle Finish: Brown Handle Color: Brown Quantity: 1 Package Contents: Rough Rider Mushroom Knife Rough Rider K1272-RR1469: Mushroom Knife Folding Knife440A Steel