W-100 and 99 Berylco 5/16×11/32 and 3/8×7/16 1/4×9/32, 3/16×7/32 Non-Sparking Double Open End Wrench. Condition is «New». Shipped with USPS Priority Mail. This is a listing for new wrenches made from copper and beryllium. This composition allows for work on gas due to the non sparking nature. Priced to sell at 30% off of retail price! Be sure to check out my other Berylco listings!