DMT Diafold Magna-Guide DMTDMG. This Knife Sharpener from the knife lovers at DMT includes magnetic angle guide and Aligner clamp and is for use with DMT Double Sided Diafold Diamond Sharpeners. Don't venture outside without the DMT Diafold Magna-Guide Knife Sharpener. Features of DMT Diafold Magna-Guide Knife Sharpener: Includes magnetic angle guide and Aligner clamp Use with DMT Double Sided Diafold Diamond Sharpeners Hang packaged Package Contents: DMT Diafold Magna-Guide DMT DMTDMG: Diafold Magna-Guide