Installation and use is intuitive and simple. Drill bit was sharp and efficiently bored out both cast and forged hosels. No instructions were included and could not find any on the website (did I miss them?). Instructions would have been nice in order to confirm my procedures as this was my first installation. Shaft changes are quick and easy. Nice feature that club head weight remains the same as bored out material equals weight of hosel adapter piece!
Universal ALL-FIT MASTER Golf Iron Adapter Shaft Hosel & Nut 0.370