https://byviva.com/product/make-it-snappy-tools-5pc-self-centering-hinge-drill-bit-set-spring-loaded-proudly-made-in-the-usa/
Material High Speed Steel (HSS) Cutting Diameter 13 Hundredths-Inches Finish Type Steel Shank Type Hex Cutting Angle String 118 Degrees
make it snappydrill bittoolsselfcentering