Brand Name: Jacobs
*Chuck Size: 1/2 in.
*Pilot Size: 1/4 in.
*Model: K30
*Product Type: Chuck Key
*Handle Type: T-Handle
*Material: Steel
*Number in Package: 1 pc.
*Usage: 1/4, 3/8 and 1/2 inch Multicraft
*True size: 15/64 in.