Heavy Duty Quarter Twenty Knobs 20 Pack Black Star Thumb Screws With Grippy Non Slip Handles Sweet Upgrade For T Track Jigs And Home Shops That Want A Rock Solid Fit And Quick Touchups

Premium Black 1/4-20 Female Thread Knobs for Shop Jigs
✔️ Twenty black knurled locking handles with brass insert for rails

These are twenty black hand tightening knobs made for machine shops and woodworking benches. The six point star face gives you a solid grip without slipping or stripping threads. You screw them right onto standard quarter twenty rods to lock fence guards, clamp fixture boards, or adjust lathes fast.

✅ Precision cut quarter twenty female threads that mate perfectly with standard hardware
✅ Durable polycarbonate shell built around a hardened brass threaded insert
✅ Overall length runs thirty millimeters to equal 1.18 inches across a 6 mm wide 0.24 inch face
✅ Twenty piece retail pack sized for outfitting entire workbenches and router tables

💡 Why do woodworkers swap out standard flat discs for star pattern mounting knobs on jigs?
Most tradesmen find these handy since the raised ridges grab sweaty palms much faster than smooth plastic ever could when you need instant clamping power.
- The ribbed exterior surface multiplies gripping force so you can seat steel brackets hard enough to kill wobble during aggressive planing runs
- A hollow center bore lets you slide alignment dowels straight through the stem giving you plenty of leeway to tweak clearance gaps while building cabinets
- The swaged metal liner keeps the polymer body from cracking when you crank past tolerance on hardwood assemblies that swell under moisture changes

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