Length of Torx tip is cut to 1/2 the normal depth.
VIM Tools T30 TORX Driver 8 Inch OAL, 3/8 Inch Square Drive Holder
VIM Tools XZN10 Half Cut 12 Point Bit, 5/16 Inch Hex, 5/8 Inch OAL
VIM Tools T20 Half Cut TORX Bit, 1/4 Inch Hex, 5/8 Inch OAL
VIM Tools T50 Half Cut TORX, One Piece Impact Driver, 3/8 Inch Square Drive
VIM Tools T20 Half Cut TORX, One Piece Impact Driver, 3/8 Inch Square Drive