Description To make a tax free purchase, please complete the Tax Exemption Form Allen wrench, 1/16 – tool used in the repair of braillers. Hex Size: 1/16″ Length Range: Less than 4″ Overall Length: 3″ Material: Steel Units Per Package: 1 Current Part Number: 08-0021-0-0 Past Part Number(s): BST #21 Assembly Location (if applicable): Applicable Braillers: Perkins Brailler, APH Light Touch Brailler, Electric Perkins Brailler, Large Cell Perkins Brailler, Large Cell Electric Perkins Brailler, Unimanual Perkins Brailler, SMART Brailler, Next Generation Perkins Brailler