Made in the USA W.L. Fuller Made of high quality steel material For use on drill bits to control cutting depth Metric sizing Two hex-socket set screws in stop collar Product Description Specs High quality American-made metric sized drill stops made by WL Fuller. Designed for use on drill bits, these drill depth stops are held solidly in place to a drill bit with two set screws, to give positive control on depth of the drill cut. To control the depth of the counterbores or countersinks only, see our Stop Collars 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. Drill Size (Inside Diameter) Decimal (Inside Diameter) Outside Diameter Model 2 mm .0787 23/64\” 106000787 3 mm .1181 3/8\” 10600118 4 mm .1575 7/16\” 106001575 5 mm .1968 1/2\” 106001968 6 mm .2362 1/2\” 10600236 7 mm .2756 5/8\” 10600275 8 mm .3150 3/4\” 10600315 9 mm .3543 3/4\” 10600354 10 mm .3937 7/8\” 10600393 11 mm .4331 7/8\” 10600433 12 mm .4724 7/8\” 10600472