Professional Allen keys for commercial or occasional use Metric extra long ball ended Allen hex keys Manufactured from chrome vanadium steel for strength and durability 3/8" drive so will fit any 3/8" drive ratchets / power bars etc... 3mm - 10mm hex bits Ball end allows turning of fasteners at a slight angle allowing much better access in tight restricted areas Extra long bits (110mm total length) so perfect for access into restricted confined spaces SET INCLUDES THE FOLLOWING 1. 3mm ball ended Allen Hey key bit - total length 110mm 2. 4mm ball ended Allen Hey key bit - total length 110mm 3. 5mm ball ended Allen Hey key bit - total length 110mm 4. 6mm ball ended Allen Hey key bit - total length 110mm 5. 7mm ball ended Allen Hey key bit - total length 110mm 6. 8mm ball ended Allen Hey key bit - total length 110mm 7. 10mm ball ended Allen Hey key bit - total length 110mm Comes in a blow molded case for easy storage and transportation