0.209" blank holder to fit all generations of B1.  6082 T6 Aluminium CNC machined base. High friction diamond knurl grip to aid in removal in harsh environments. Tough anodise coating to prevent corrosion. Available in a range of colours to mix and match as you wish. PLEASE NOTE: Modification to this device to accept larger munitions will void any warranty and may cause failure of the device.  For safety - Only to be use on devices marked ".209 (Primer)"