Chess-Tools CT-402 Bass+Guitar Multi Tool card with euro slot. CT-402 -17-piece Set of universal bass and guitar allen keys Contains the most important allen keys in mm and inchSet contains: 6x Ball point hex key: 5mm, 4mm, 3mm, 2.5mm, 2mm,1.5mm7x Ball point hex key: 1/20, 1/16, 5/64, 3/32, 7/64, 1/8, 3/161x Flat 2.5mm, 1x PH no.1 (cross)1x Socket for the 5/16 rod, 1x for 1/4 rodAll keys are made from high-grade chrome-vanadium steelSockets are exchangeableSizes are suitable for nearly all common E-guitars and E-bassesEach set comes in a Chess-Tools blister