Used only a few times. From the manufacturer: Colors: Silver/Red/Black Brand: WIZ'A Material: Color ring: Anodized aluminum, Wrench: CR-V (chrome-plated) Item Length: 18.6 centimeters Item Weight: 454 grams Number of packages: 1 Application: For tightening and loosening hexalobular (Torx) bolts and tamper-resistant screws. Set contents: Hexalobular (Torx) T10/T15/T20/T25/T30/T40/T45/T50/T55 Wrench size (T10): Compatible with bolts with holes (M3), set screws (M5), countersunk bolts (M3), button head bolts (M3) Wrench size (T15): Compatible with M3.5 hexalobular (Torx) screws Wrench size (T20): Compatible with set screws (M6), countersunk bolts (M4), button head bolts (M4) Wrench size (T25): Compatible with socket head bolts (M4), countersunk bolts (M5), button head bolts (M5) Wrench size (T30): Compatible with socket head bolts (M6), countersunk bolts (M6), button head bolts (M6) Wrench size (T40): Compatible with set screws (M10), countersunk bolts (M8), button head bolts (M8) Wrench size (T45): Compatible with socket head bolts (M8), set screws (M12) Wrench size (T50): Compatible with socket head bolts (M10), set screws (M14), countersunk bolts (M10), button head bolts (M10) Wrench size (T55): Compatible with socket head bolts (M12), set screws (M16), countersunk bolts (M12), button head bolts (M12) Specifications: Semi-long type Specifications: With size identification color rings