Flagaway&reg; Size 12" x 0.64" Uncut Blank Rifle Picatinny Rail Mount for Handyman or Gunsmith Uncut Picatinny Blank Gunsmith Rail RAIL LENGTH (inch): 12.(L) X 0.75(W) X 0.64"(H) RAIL TYPE: WEAVER / PICATINNY 4 Pre-Drilled Standard Spacing Holes to accommodate various applications.