Features: Metric most common M3 to M6 bolt thread cutters with T handle wrench Made of durable HSS steel for long life and durability of the tool Suitable for soft alloy cast steel or aluminum engine block Includes four drill bits and four matching taps in one kit Comes in a small plastic storage case Specifications: Model: 9PC-TAP Material: HSS Steel Size:M3-M6 approximate size: 1/8in 1/4in Shank length: 60mm Shank diameter: 15mm Rod length: 80mm Rod diameter: 6mm Includes taps: M3x0.5, M4x0.7, M5x0.8 and M6x1 Includes drill bits: 2.5mm, 3.5mm, 4.2mm and 5.2mm Set includes: 4 drill bits, 4 metric taps and T-handle Please note: This product requires a drill and eye protection, suggested to be used with automotive oil Package Included: 4pcs drill bits 4pcs taps Adjustable tap handle Plastic storage case