Woodturners using Simple Turner and Hollower tools, this replacement carbide cutter is exactly what you need to keep your tools cutting like new! The 1/2-inch diameter carbide tip is precisely the right size for Mid Size Simple Turner & Hollower tools engraved with MSTH and Simple Start tools marked SSTH. The quality is excellent - sharp out of the package and maintains its edge through plenty of turning projects. Installation is straightforward with the required 8/32 x 5/16-inch flat head socket cap screw (T15 Torx head). Having spare cutters on hand means you never have to stop a project because your tool gets dull - just swap in a fresh cutter and keep turning. The carbide material handles hardwoods beautifully and provides clean, smooth cuts without tear-out. I keep several of these in my workshop and they've saved me multiple times when I've been in the middle of a turning project and needed a sharp edge. Important note - this specific cutter only fits the MSTH and SSTH tools, not other mid-size or full-size Simple tools, so double-check your tool engraving before ordering. The consistency between cutters is impressive - each one performs exactly the same, so you get predictable results every time. Whether you're a professional woodturner or a serious hobbyist, having reliable replacement cutters is essential, and these deliver the quality and performance you need at a reasonable price. They've become an essential part of my woodturning toolkit!