Tapered design allows for negative or positive adjustments in stock pitch without altering the stock; adjusts length of pull. Sands and finishes beautifully. Slotted holes for universal fit. Mfg: 100 Straight Products SPECS: Black polymer plastic. 2-3/16" (5.5cm) wide. 5-7/8" (15cm) long, 2A 3/4" (6.9cm) minimum c-to-c hole spacing. Tapers - A 1/4" (6.3mm) to 1/16" (3.1mm) positive and negative, A 1/2" (12.5mm) to 1/8" positive and negative. Negative is thicker at to