Universal Parts Engine Case Boring Tool Replacement Bit $13.99 Quantity discounts available QuantityPrice SKU: 202-45 This item is IN STOCKCurrent Stock: 19 Quantity -+ Add to Cart Details Specs Replacement 5/16" Bit 7.9mm x 7.9mm Overall Length: 40mm Supported Models 40QMB 50cc 2-stroke, 50QMF 90cc/100cc , GY6 QMI/QMJ 152/157, QMB139 50cc/49cc DetailsSpecsSupported Models Back Universal Parts Replacement 5/16" Bit for the Universal Parts Engine Case Boring Tool. Back Replacement 5/16" Bit7.9mm x 7.9mmOverall Length: 40mm Back 40QMB 50cc 2-stroke, 50QMF 90cc/100cc , GY6 QMI/QMJ 152/157, QMB139 50cc/49cc