Steel collet is set into hollow brass handle with screw chuck
are approximately 1 3/4(44 mm) long and are used with flex shaft or micromotors
Lenses are made of the highest quality optical glass
Strength-Standard 2230-330 Great Wheel 2230-340 Third Wheel 2230-429 Balance Staff 2230-510 Driving Wheel for Ratchet Wheel 2230-550 Pinion for Oscillating Weight 2230-5110 Screw for Barrel Bridge
340PB8JN02 Seiko Watch Crystal PR-315 Steel collet is set intoReplace your existing watch crystal with a high quality, exact replacement. Get a perfect fit for Seiko watches with these replacement Watch Crystal 340PB8JN02! Enjoy superior clarity and convenience with this straight forward replacement. Compatible with Seiko Case No. 7T62 0JD0, 7T62 0JE0, 7T62 0KM0, 7T92 0KY0, 7T92 0LV0, 7T94 0AZ0, 7T94 0BA0, Seiko Crown(s): 8K65ATSNZ3, 8K60DMSNW1, 8K60BYSNW1, 8K55BMSNW1, Case Back Gasket: FE338BAD4 Crystal Gasket: