BPE Arrow Fletcher Right Helical Black. Large easy-to-turn indexing knob with zero index position mark. Nock receiver may be rotated to any position for precise placement of your nock in relation to the fletching. It will even allow placement of the cock feather down if desior allow adjustment for best fletching clearance on a particular bow. The clamp is graduated for easy fletching placement in relation to the nock. Specifications for BPE Arrow Fletcher: Manufacturer: BPE Color: Black Package Contents: BPE Arrow Fletcher BPE AF1RH: Arrow Fletcher Right Helical Black