Allows access into tight, restricted spaces. Head can be used with a cordless drill. Includes 12 bits in PzDrive, Philips, Flat and Star. Sizes include Flat 4 | 7mm, Phillips Ph1 | Ph2, PzDrive Pz1 | Pz2 | Pz3 & Star T10 | T15 | T20. 3 way angled head, 10 bits and bit holder. Sizes include Flat 4 | 7mm, Phillips Ph1 | Ph2, PzDrive Pz1 | Pz2 | Pz3 & Star T10 | T15 | T20. Allows access into tight restricted spaces. Head can be used with a cordless drill. Special shank size for use with ratchet driver only.