The 83509 GearWrench Folding Hex Key 9PC Set SAE meets or exceeds ASME standards and a handle constructed from dual material and designed for comfort. The 83509 GearWrench Folding Hex Key 9PC Set SAE features keys are clearly marked for easy identification and keys rotate 270 degrees for greater access and torque. The 83509 GearWrench Folding Hex Key 9PC Set SAE includes caddy for storage and organization, keys made with alloy steel for maximum strength and to resist rotational distortion and chamfered edges on both ends help guide the key into the fastener smoothly and quickly.