ITEM NAME:2pc 3.8mm 4.5mm Security Screwdriver Bit Tool fit for Nintendo NES N64 Game Boy Security Screwdriver Bit 3.8mm+4.5mm Tool Set fit for Nintendo NES SNES N64 Game Boy SNES SPECIFICATIONS.(1 x 3.8mm screwdriver bit. 1 x 4.5mm screwdriver bit. 3) Identification and corrosion resistance. 2) Heat treated for maximum strength. 4) Precision engineered teeth fit tightly. Sleeve Type: 6mm Hexagonal.