Specifications:  56 bits in the following sizes:  - Flathead sizes 1.0, 1.5, 2.0, 2.5, 3, 3.5, 4 mm;  - JIS sizes 000, 00, 0, 1;  - Hex sizes 0.9, 1.3, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 6.0 mm;  - Phillips sizes 1.0 1.5 2.0 2.5 3.5;  - Torx sizes T3, T4, T5, T6, T7;  - Torx Security TR8, TR9, TR10, TR15, TR20 (compatible with non-security);  - Y2.0 Y3.0 Y size 0.8;  - Mainboard size 1.5;  - Triangle size 2.3- U2.6;  - Pentalobe sizes 0.8 1.2 1.5 2.0 (For iPhone, MacBook Air, MacBook Pro);  - Square sizes 0, 1, 2;  - Nut Driver sizes 2.5, 3.0, 3.5, 4.0, 5.5, 5 mm.     Features:  - 4 mm Aluminum Driver - featuring a magnetic socket, rubber grips, and a ball-bearing swivel top.  - Flexible Shaft Extension - snake into hard to reach places.  - 60 mm Shaft Extension - doubles as a T-handle for extra torque.  - Connector - use this kits 4 mm bits in standard 1/4' drivers.     Package Included:  1 Set x 24 In 1 Precision Screwdriver.