Made in the USA · W.L. Fuller Made of high quality steel material For use for countersinks & counterbores to control cutting depth Two hex-socket set screws in stop collar Product Description Specs High quality American-made stop collars made by WL Fuller. Designed for use on countersinks & counterbores, these steel collars are held solidly in place with two set screws, to control the depth of the counterbores or countersinks. The inside diameter of the stop collar fits the outside diameter of the countersink or counterbore. To control the depth of the drills only, see our Standard Drill Stops here & our Metric Drill Stops here. Made in the USA. The W.L. Fuller Co. is a family owned, third generation manufacturer of the best countersinks, counterbores, plug cutters, taper point drills, brad point drills, & step drills. All made 100% in the U.S.A. today. With over 60 years experience manufacturing tools to cut woods, plastics, & metals, Fuller provides tools you need to get the job done while saving you time & money. All of their products carry their “satisfaction guarantee”. Model Inside Diameter Width Outside Diameter Model 1/4" Inside Diameter 1/4" 1/4" 31/64" 11900250 5/16" Inside Diameter 5/16" 1/4" 35/64" 11900312 3/8" Inside Diameter 3/8" 1/4" 5/8" 11900375 7/16" Inside Diameter 7/16" 1/4" 43/64" 11900437 1/2" Inside Diameter 1/2" 1/4" 47/64" 11900500 9/16" Inside Diameter 9/16" 1/4" 13/16" 11900562 5/8" Inside Diameter 5/8" 1/4" 7/8" 11900625 3/4" Inside Diameter 3/4" 1/4" 1" 11900750 7/8" Inside Diameter 7/8" 1/4" 1-7/64" 11900875 1" Inside Diameter 1" 5/16" 1-1/4" 11901000 1-1/8" Inside Diameter 1-1/8" 5/16" 1-3/8" 11901125 1-1/4" Inside Diameter 1-1/4" 3/8" 1-1/2" 11901250 1-3/8" Inside Diameter 1-3/8" 3/8" 1-5/8" 11901375 1-1/2" Inside Diameter 1-1/2" 7/16" 1-3/4" 11901500
