So to do this again, I've been doing Chelsea 890 PTO rebuilds, and there is 2 particular bolts that have been impossible, So I put GRIP EDGE to the test , First this is a 1/4" allen drive about 5" long about 1/2"diamiter long shoulder with 3/8" thread in , So SNAPON STANDARD 1/4 ALLEN SOCKET TWISTED RIGHT OFF, THEN 1/4" STUBBY ALLEN SOCKET DIDN'T BRAKE BUT TWISTED OUT , SO LAST PTO I DID REQUIRED ME TO WELD A 1/2" NUT ON AND HEAT TO GET OUT, (REPLACEMENT BOLTS ARE A 14 WEEK BACKORDER) SO I STILL HAVE TO REUSE. SO ENTER GRIP EDGE #5 REMOVER BIT , IT DID NOT GET IT OUT BUT IT WAY OUT PERFORMED BOTH ALLENS, IT DID NOT SLIP, BUT I DID BREAK IT I REALLY PUT THE POWER TO IT BOTH DIRECTIONS AND I WAS SHOCKED THAT IT DIDN'T LOSE GRIP BUT ON REPEATED BACK AND FORTH INCREASING POWER( DID I MENTION THIS BOLT IS REALLY A DUMB DESIGN) I HEARD THE DEATH CREEK AND SNAP #5 NO LONGER A LIVE, BUT WAIT THERE IS MORE I ALSO BOUGHT THE GRIP EDGE BOLT EXTRACTOR SET SO I EMPLOYED THE HAMMER AND DROVE IT ON, BACK AND FORTH WE GO AND IT DOESN'T MOVE SO TO AID THE SMOKE WRENCH CAME AND WE GOT HER OUT BOTH BOLTS, NOW THE REALLY COOL THING THE EJECTOR POPPED SCOCKET RIGHT OF OF THIS STUPID BOLT HEAD AND I REBUILT THE CLUTCH, NOW REASSEMBLY AND I COULD USE THE STUBBY SNAPON ALLEN SOCKET TO REINSTALL AND TORQUE TO SPEC. WHICH SHOCKED ME AFTER WHAT I DID TO GET IT OUT ! SO AS FOR MY RATING '5 STARS' ALL THE WAY THESE ARE REALLY QUALITY TOOLS. NOW CUSTOMER SERVICE , I WAS THINKING I WAS GOING TO PAY FOR MY TEST AND THEY WOULD NOT STAND FOR IT THEY SENT ME REPLACMENT LICKITY SPLIT HAD IT WITH IN THE WEEK AND MY SET IS READY TO GO, SO CUSTOMER SERVICE ON A SCALE OF 1 TO 5 I GIVE THEM A '10' THEY WERE TERRIFIC. NOW I NEED TO LET EVERYONE KNOW THAT THEIR DRILL BITS ARE HARD AND SHARP SO USE THEM WITH 2 HAND AND NOT TO MUCH DRILL I BROKE THE LITTLE GUY BEING STUPID USING 1/2" DRILL WITH ONE HAND BUT IT CUT INTO A GRADE 8 BOLT UNTIL IT DIDN'T, JUMPED UP 2 SIZES AND GOT IT DONE WITH NO MORE FATALITIES. SO I DO RECOMMEND GRIP EDGE AND NO THEY DIDN'T PAY ME, I BOUGHT EVERYTHING EXCEPT REPLACEMENTS, I HAVE BEEN A MECHANIC 40+ YEARS AND I DON'T USUALLY GET EXCITED BUT I SURE WAS PLEASED WITH THE RESULTS