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Grinder Protector Thumbonie

Grind your glass without irritating your thumbs, The Thumbonie's ergonomic design makes it comfortable to grind any piece of glass with side vents to reduce internal buildup of heat. Included is a rubber O-Ring to prevent slippage of the glass while grinding. Unlike other grinding accessories you no longer have to sacrifice comfort for functionality with the Thumbonie.
$15.99
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$15.99