PL Robertson has created 4 special double end bits for Megapro. These bits are designed to be compatible with MEGAPRO drivers. All authentic Robertson tips are manufactured from a specially modified tool steel and carefully heat treated to provide maximum wear and torque. Made in the USA with a lifetime warranty. The name MEGAPRO is our promise of quality to you. Loaded with 7 double end professional quality bits, this assortment of bit types and sizes provides the 14 most popular tips for driving screws. The shaft opening serves as a 1/4a ^2 hex driver! Hence the name "15-in-1a ^2. Specifications: Weight: .5 lbs Driver Features: Retractable Bit Cartridge, EZ Guide Collar, Robertson, Palm Saver Cap Screwdriver Bits: Flat, Square, Phillips, 1/4a ^2 Hex Shaft Warranty: Lifetime Warranty Made in: USA