Item No.: H47D065

.Thicken opening coated with emery, smooth nickel plating surface to resist corrosion

.High precision, smooth cut with no broken edge and with

.large clearance hole, this diamond drill bits do a good job on drill holes on glass

.This glass drill bits totally 5pcs；

.Diamond hole saw : 5/32" 1/4" 5/16" 3/8" 1/2";

.With strong Suction Base Thicken rubber, hole saw for glass drill bit set is more durable;

.Applicable from 4-12mm holes,Size from 4-5-6-7-8-10-12mm