These are the MIP Speed Tip 3-Piece Hex Driver Standard Wrench Inserts.

FEATURES: Compatible with standard 1/4" hex chuck with adjustable clutch- works with nearly any power drill or screwdriver Precision CNC ground in house from hardened US tool steel drill blanks Laser marked with the MIP Logo and hex size Limited lifetime warranty through MIP beginning at date of purchase

INCLUDES: 3/32" 5/64" and 1/16" Hex Drivers

SPECS: Length of 3/32" 5/64" Wrenches: 4.3" (110mm) Length of 1/16" Wrench: 3.5" (89mm) 13  

BOX DIMENSIONS: 4.00" W. X .25" H. X 5.75" L. BOX WEIGHT: .11 LBS.