End Wrench

Which tools are required when adjusting a roll-up door counter-balance spring?

please help! possible answers are
C-clamp and band clamp
Two round rods, lock-type clamp, and open-end wrench
Pliers, pipe wrench and large screwdriver
Large screwdriver and pry bar
this is the question from an exam that I need to write... not for my garage door...
I am stuck between b and c, anyone, any idea?

A phone. Call a garage door place. Your messing with danger.

Discover End Wrench On eBay Below:

1 USED WILLIAMS USA 1912 2 OPEN END OFFSET WRENCH
1 USED WILLIAMS USA 1912 2 OPEN END OFFSET WRENCH
$79.99
Wrench Open End Barton Instrument 0163 0044C
Wrench Open End Barton Instrument 0163 0044C
$3.99
DURCROM OPEN END 70MM WRENCH USNT
DURCROM OPEN END 70MM WRENCH USNT
$77.97
ridgid 31050 6 End Pipe Wrench Model E 6
ridgid 31050 6 End Pipe Wrench Model E 6
$26.12
5 SAE Striking and Slugging Heavy Duty Box End Wrench
5 SAE Striking and Slugging Heavy Duty Box End Wrench
$159.00
6 1 4 SAE Striking and Slugging Heavy Duty Box End Wrench
6 1 4 SAE Striking and Slugging Heavy Duty Box End Wrench
$198.00
4 1 4 SAE Striking and Slugging Heavy Duty Box End Wrench
4 1 4 SAE Striking and Slugging Heavy Duty Box End Wrench
$139.00
4 SAE Striking and Slugging Heavy Duty Box End Wrench
4 SAE Striking and Slugging Heavy Duty Box End Wrench
$135.00
4 1 4 SAE Striking and Slugging Heavy Duty Box End Wrench
4 1 4 SAE Striking and Slugging Heavy Duty Box End Wrench
$139.00
4 1 4 SAE Striking and Slugging Heavy Duty Box End Wrench
4 1 4 SAE Striking and Slugging Heavy Duty Box End Wrench
$139.00
NOS Open End Engineers Single Head Wrench 2 9 16 Martin 15
NOS Open End Engineers Single Head Wrench 2 9 16 Martin 15
$149.00
Open End Wrench Heavy Duty Construction Engineer 1 3 4 2 15 16
Open End Wrench Heavy Duty Construction Engineer 1 3 4 2 15 16
$225.00
CHROM VANADIUM IZELTAS OPEN END SPANNER WRENCH 27 32 81 8TM USED
CHROM VANADIUM IZELTAS OPEN END SPANNER WRENCH 27 32 81 8TM USED
$33.00
ASH ASAHI OPEN END WRENCH 36 L 12 SN41 USED
ASH ASAHI OPEN END WRENCH 36 L 12 SN41 USED
$10.00
WILLIAMS OPEN END WRENCH 1 1 8 BW 707 USED
WILLIAMS OPEN END WRENCH 1 1 8 BW 707 USED
$21.00
Bondhus 69600 Ball End Double Pack L Wrench Set with ColorGuard 13 Piece
Bondhus 69600 Ball End Double Pack L Wrench Set with ColorGuard 13 Piece
$39.29
Generic Open End Wrench 339 568 A Used 67892
Generic Open End Wrench 339 568 A Used 67892
$50.00
WORKPRO Offset Wrench Set Double Box End Metric Cr V DIN Standard 8 piece with
WORKPRO Offset Wrench Set Double Box End Metric Cr V DIN Standard 8 piece with
$22.80
FAIRMOUNT MARTIN 2 3 4 Large Wrench Superwrench Single Head Open End
FAIRMOUNT MARTIN 2 3 4 Large Wrench Superwrench Single Head Open End
$100.00
Engineers Open End Wrench 7 8 1 Chrome Alloy
Engineers Open End Wrench 7 8 1 Chrome Alloy
$6.99
NOS 2 7 16 Twist Lock Open End Wrench 8D00136 1 244 5120013931086
NOS 2 7 16 Twist Lock Open End Wrench 8D00136 1 244 5120013931086
$600.00
Rare Antique Merit Tool Double End Adjustable Wrench No 6 and 8 Tool Steel
Rare Antique Merit Tool Double End Adjustable Wrench No 6 and 8 Tool Steel
$38.00
Berylco W 98 Double Open End Wrench 1 4 x 9 32
Berylco W 98 Double Open End Wrench 1 4 x 9 32
$19.99
17 1 2L Double End Valve Wheel Wrench Westward 5PWE7
17 1 2L Double End Valve Wheel Wrench Westward 5PWE7
$54.99
NOS Williams Open End Wrench 2 9 16 BW 15 Steel 30026 A A 1354 5120014666246
NOS Williams Open End Wrench 2 9 16 BW 15 Steel 30026 A A 1354 5120014666246
$200.00
ZMC RS 803 Intermediate Retractable Idler Ends w Plastic Wrench 10mm NOS
ZMC RS 803 Intermediate Retractable Idler Ends w Plastic Wrench 10mm NOS
$29.98
NOS Open End Single Head Wrench 2 9 16 Martin 15 BW14A GGG W 636
NOS Open End Single Head Wrench 2 9 16 Martin 15 BW14A GGG W 636
$175.00
NOS Open End Engineers Single Head Wrench 2 9 16 Martin 15
NOS Open End Engineers Single Head Wrench 2 9 16 Martin 15
$149.00
Westward 6 Piece Ratcheting Open End Combination Wrench Set Metric Range of
Westward 6 Piece Ratcheting Open End Combination Wrench Set Metric Range of
$38.32
Large Orange Open End Pipe Wrench 1 1 4 2
Large Orange Open End Pipe Wrench 1 1 4 2
$15.99
Armstrong 1 1 4 31 040 Single Head Open End Wrench USA
Armstrong 1 1 4 31 040 Single Head Open End Wrench USA
$29.00
WORKPRO Offset Wrench Set Double Box End Metric Cr V DIN Standard 8 piece with
WORKPRO Offset Wrench Set Double Box End Metric Cr V DIN Standard 8 piece with
$22.67
BF DIN 895 22mm x 20mm Double Open End Wrench 7 1 2 OAL
BF DIN 895 22mm x 20mm Double Open End Wrench 7 1 2 OAL
$10.79
CIP 10432 7 8 x 12 Insulated 12pt Single End Ratchet Wrench Qty 1 USA
CIP 10432 7 8 x 12 Insulated 12pt Single End Ratchet Wrench Qty 1 USA
$36.80
Cornwell 2 USA BW 3032 15 16  1 12pt Box End Wrench
Cornwell 2 USA BW 3032 15 16 1 12pt Box End Wrench
$17.99
1Pcs 13mm Square Drive 84mm 18 Flutes End Cap Style Oil Filter Wrench Tool
1Pcs 13mm Square Drive 84mm 18 Flutes End Cap Style Oil Filter Wrench Tool
$6.82
1Pcs 13mm Square Drive 65mm 14 Flutes End Cap Style Oil Filter Wrench Tool
1Pcs 13mm Square Drive 65mm 14 Flutes End Cap Style Oil Filter Wrench Tool
$9.22
1Pcs 13mm Square Drive 74mm 14 Flutes End Cap Style Oil Filter Wrench Tool
1Pcs 13mm Square Drive 74mm 14 Flutes End Cap Style Oil Filter Wrench Tool
$9.71
VINTAGE PC 2250 USED DOUBLE BOX END WRENCH 1 5 8 AND 1 7 16 2250
VINTAGE PC 2250 USED DOUBLE BOX END WRENCH 1 5 8 AND 1 7 16 2250
$25.00

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