The answer is thinning shears. Milady's cutting-and-blending instructions for hair replacement systems state directly: use thinning shears to blend the ends of the replacement.
Regular haircutting shears, clippers, and razors are all legitimate barbering tools, but for this specific task — softening the transition line where a replacement system meets the client's own hair — the book calls specifically for thinning shears, which remove bulk without creating a hard edge.
Milady Standard Barbering, 6th ed., Ch. 15 (Men's Hair Replacement), p. 508: "Use thinning shears to blend the ends of the replacement."
This is 1 of the real Hair Science questions in FadeJunkie's Milady-sourced 300-question bank. See the Hair Science practice questions page for a fuller sample, or try the Hair Science practice quiz and flashcards for free. A one-time $15 lifetime pass unlocks the complete question bank across all 13 tested topics.
More real Hair Science questions with sourced answers: Which Hair Type Needs a Humectant-Rich Conditioner, Which Hair Type Has Low Elasticity and Tends to Knot, Which Hair Layer Can Be Missing in Fine, Blond Hair, What Usually Causes High-Porosity Hair, and 28 more on the Hair Science practice questions page.
Browse every topic on the Practice Question Hub, or see the Texas Barber State Board Exam Guide for the full exam process — required hours, PSI scheduling, and fees.