AJC Hatchet 057-MCGA Guardian Angle Knife New dual function design comes with wing nut for quick blade adjustment and old style screws Specifically designed for cutting shingles Comes complete with AJC's Big Hook [059-HB5 (2512-0098)], Bowtie [059-BTB (2512-0080)], and Standard Utility [075-97 (2512-0106)] blades Features hand and knuckle protection Ergonomically superior design reduces fatigue and increases leverage