includes a complete collection of 17pcs SAE taps and 17pcs dies ranging from #4 to 1/2, including 1/8 NPT, along with a ratcheting handle and a thread gauge for effortless and precise threading; durable and reliable: Made with high-quality materials, both the drill bits and taps ...includes a complete collection of 17pcs SAE taps and 17pcs dies ranging from #4 to 1/2, including 1/8 NPT, along with a ratcheting handle and a thread gauge for effortless and precise threading; durable and reliable: Made with high-quality materials, both the drill bits and taps are durable and reliable for long-lasting use; enhanced lifespan with lubrication: Using lubricating oil during tapping significantly improves the lifespan of the taps and reduces friction.