The newly redesigned IRWIN Accessory Storage Cases are visibly better. They have clear lids for easy viewing of content and are stackable for easy traveling and storage. They feature a patented bit-bar design for easy bit removal and customizable assortments of bits.The new SPEEDBOR Spade Bits now last 2X Longer* and cut 2X Faster*. They're designed with chamfered cutting edges for durability and feature a patented Blue-GrooveTM design for chip removal. *on average vs IRWIN SPEEDBOR prior generation in 1-3/8" Oak