Knob Style Limb Locking Hardware Kit is required to attach Take-Down Recurve and Take-Down Longbow limbs to the riser. Knurled knob allows limbs to be removed easily without any tool. Knobs are black anodized aluminum. 1 1/8” diameter knob for Take-Down Longbow and 1 1/8” or 1 1/2” for Take-Down Recurve. Inserts and pins available in steel, stainless steel and brass.