PVC Tipped Aluminum Hold Down - 1/4" x 20 1 each 1/4" x 20 PVC tipped aluminum hold down Clamp feature non-marring PVC tips More gripping power when pressure is applied to your stock. Includes star knob and bolt Available in the two most commonly used sizes of 1/4" x 20 and 3/8 x 16 (EACH SOLD SEPARATELY)