Die cast alloy. Self supporting fletching tool, strong permanent magnet. Precise, uniform placement of feathers, vanes. Self-centering shaft cradle centers any size shaft. Adjust angle of fletching w/use of dials at top & bottom. Feather spacing: 3 fletch 120, 4 fletch 75x 105, 4 fletch 90selections made w/slight screw adj.. Clamp held at 45angle. Complete w/wrenches & instructions. TARGET SHOOTERS: Straight jig w/standard nock receiver ; for right, left, offset fletching. COMPOUND SHOOTERS & OVERDRAWS: Right Helical jig & clamp w/right nock receiver & right helical clamp. COMPOUND SHOOTERS: Left Helical jig & clamp w/left nock receiver & left helical clamp. TRADITIONAL SHOOTERS: Straight jig w/standard nock receiver & right helical clamp.