The BOSTITCH BTMT72270 8pc Flex Head Ratcheting MM Wrench Set features a flex head design for improved accessibility. The anti -slip design allows greater contact area against the fastener. This set is made of a high quality chrome vanadium forged body which allows for torque, strength & durability. The closed end of these wrenches include a ratcheting function which helps increases productivity with improved speed. The special Max-Drive design allows for 15% more torque and helps reduce fastener rounding. (vs. standard combination wrenches). Includes a convenient storage rack which allows for permanent set containment, easy organization and tool protection.