Lansky Sharpeners Pocket Arkansas Stone Clam. The Lansky Pocket Arkansas Stone is small enough to keep on hand so you can always sharpen your blade. The stone has two special grooves on one face for sharpening pointed objects and comes with a handy leather pouch and keychain. Specifications for Lansky Pocket Arkansas Stone Sharpener: Manufacturer: Lansky Sharpeners Overall Length: 3.13 in Blade Material: Stone Features of Lansky Pocket Arkansas Sharpening Stone: Portable pocket-sized sharpener Arkansas novaculite stone Dual grooves for sharpening Package Contents: Lansky Pocket Arkansas Stone Sharpening Block Leather pouch Keychain Lansky Sharpeners LSAPS: Pocket Arkansas Stone Clam