For grooves inside blind hole.
3M 26137, PPS Series 2.0 Adapter, Type S41, Trapezoidal Thread - QCC, 7100135947
3M 13734, Scotch-Brite EXL Unitized Wheel, XL-UW, 2S Fine, 1 in x 1/4 in x 1/8 in, 7000000722
3M 01319, Scotch-Brite Cut and Polish Flap Brush, 12 in x 2 in x 5 in 7A MED, 7010299326
Standard Abrasives 855753, GP Plus Wheel, 8 in x 1/2 in x 3 in 10S FIN, 7010294960
Standard Abrasives 877002, Unitized Mounted Point, 811 B52 x 1/8 in, 3M 7100025527
3M 26137, PPS Series 2.0 Adapter, Type S41, Trapezoidal Thread - QCC, 7100135947
3M 13734, Scotch-Brite EXL Unitized Wheel, XL-UW, 2S Fine, 1 in x 1/4 in x 1/8 in, 7000000722
3M 01319, Scotch-Brite Cut and Polish Flap Brush, 12 in x 2 in x 5 in 7A MED, 7010299326
Standard Abrasives 855753, GP Plus Wheel, 8 in x 1/2 in x 3 in 10S FIN, 7010294960
Standard Abrasives 877002, Unitized Mounted Point, 811 B52 x 1/8 in, 3M 7100025527
For grooves inside blind hole.
