ARNDT Set of 8 Pcs Hexagonal Keys. (No engraving on keys up to 3.0mm due to the tiny size). Sizes on pictures for illustration purposes. Price for 1 set.
eBay
Wanyifa Titanium Bolt M4x10 13.5 15 20 25mm Allen Key Small Head Screws for Bicycle Thumb Shifter Rear/front Derailleur 5/12pcs
Aliexpress UK
Bondhus 13pc imperial stubby ball end hex key set. - Screws can be turned continuously without repositioning tool. - Ball ends automatically funnel into screw heads. - Provides better tool grip. - Dry, corrosion resistant finish.
eBay
1pc Y Shape Bike Allen Wrench Internal Hexagon Wrenches 8mm 9mm 10mm MTB Road Bicycle Cycling Hex Key Tools
Aliexpress UK
AK7174 - 9pc Stubby Low Profile Hex allen key set. SEALEY TOOLS. Stubby offset heads designed for access in very restricted areas. Key Sizes 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm. Key Length 90mm - 230mm.
eBay
Liumeili Titanium Ti M4x10 13.5 15 20mm Allen Key Small Head Bolt Screw for Bicycle Thumb Shifter
Aliexpress UK
Includes sizes: 2mm, 2.5mm, 3mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 8mm, 10mm.
eBay
ZTTO MTB Road Bike Bicycle Preset Torque Wrench 2Nm to 24Nm Precise Instrument Durable Hexagon T25 Allen Key S2 Prime Steel
Aliexpress UK
Dekton 7pc Black Hex Key Set Strong carbon steel. Metric system. Includes handy key holder. Perfect for flat pack furniture and bicycles. Includes sizes: 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, 5.0mm 6mm.
eBay
Mini Bike Ratchet Wrench 1/4 Drive Ratchet Handle Quick Release Socket Spanner Screwdriver Bit Tool Bicycle Allen Key Spanner
Aliexpress UK
HILKA 13 pce Ball Hex Long Arm Key Set. Ball end keys allow angle entry to 25º for hard to reach areas. Precisely made for use on Allen type bolts with storage clip. Black oxide coating to protect against corrosion.
eBay
2PCS Cycling Bottom Bracket Bike Bicycle Parts Spare Parts For Bicycle Bottom Bracket Axle Allen Key Crank Arm Bolts M8 Screw
Aliexpress UK
40Pcs Hex Key Set Assorted 3/8" & 1/2" Drive Allen Alan Wrench Socket Bit Tools. 9Pcs Torx Ket Set : T10, T15, T20, T25, T27, T30, T40, T45, T50. 9Pcs Hex Key Set: 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm.
eBay
1PCS Y Shape socket wrench Bike Allen Wrench Internal Hexagon Wrenches 8/9/10mm 8/10/12mm MTB Road Bicycle Cycling Hex Key Tools
Aliexpress UK
30Pcs Hex Allen Key Set with Carry Case. 15pcs Long and Short Arm Allen Key Set. 15x Long Arm Allen Key Sizes 15x Short Arm Allen Key Sizes 30Pcs Allen Keys Set with Carry Case.
eBay
Tgou Titanium Bolt M8x20/25mm Allen Key Head with Washer Screws for BMX Bicycle Handlebar Mountain Bike
Aliexpress UK