Model B - Thumler Tumbler Metal Lid meditation crystal and send the shock wave

and send the shock wave down the length to drive larger flakes from your workpiece

Approximate size of 1 tower: 12cm x 2

and the best part is that chipping is minimized because of the afore mentioned specs

The are full ammonites that have had one side of the shell sanded and polished away to reveal the inside

Luckily some were able to cross the Bering Land Bridge to Asia avoiding extinction

Model B - Thumler Tumbler Metal Lid meditation crystal and send the shock waveDescription: This is a steel lid for the Thumler's Tumbler Model B 15lb tumbler. This is the original supply part from the original manufacture (OEM). Made In: USA Diameter: 23cm Thickness: 1mm Weight: 466g Material: Steel Quantity: 1pc