These knobs for Carter and Truball thumb releases and may fit others with a #5 or larger hole.

One knob is included with each order, and multiples may be ordered by adding them to your cart. 

One stainless steel screw and nut is also included (5-40 x 1")

There are 4 Sizes to choose from

1" (25mm) Penta-Tooth

3/4" (19mm) Penta-Tooth

5/8" (16mm) Penta-Twist

3/8" (11mm) Penta-Twist 

3D printed in the USA from PETG Thermoplastic.

If you aren't satisfied, send them back for a full refund.