
I have the correct Irwin bit and this extension is not working properly. Two main complaints. The inner shank had metal burrs that prevented the bit from being inserted and secondly the set screw threads were not straight or long enough to secure the bit. This stretching further exacerbates the problems with the plain shaft racquet.

Tool set Stels Tool set, 1/2", 1/4", CrV, plastic case 94 pcs, Stels, 94 pcs, black
45 Review

π§± Bosch 2607017164 Piece Setter Masonry: Advanced Tools for Precision Masonry Work
20 Review

Bit and socket set BOSCH Promoline (2.607.017.322), 26 pcs.
24 Review

Bit set DeWALT DT7969-QZ, 32 pcs.
39 Review