Snap-On Tools USA NEW 6 Piece Sizes From 4mm – 10mm. Metric LONG LENGTH Hex Bit Socket Set. Snap-On Tools USA NEW 6 Piece Sizes From 5/32″ up to 3/8″. LONG LENGTH Hex Bit Socket Set. May have light packaging wear. Includes the following metric model numbers with corresponding sizes. Includes the following SAE model numbers with corresponding sizes.