SPRING LOADED TYPE; 22 AWG MIN. WIRE SIZE; 14 AWG MAX. WIRE SIZE; COMFORT GRIP HANDLE TYPE; STURDY DIE-CAST ZINC BODY MATERIAL; STRIPMASTER[R] BRAND; STRIPPING HOLE DIAMETER 0.039 TO 0.09 INCH; TOLERANCE +/- 0.001 INCH; INCLUDES KNIFE TYPE BLADE