1、High‑quality steel can be stable and durable, and super torsion can help you save energy. Used in combination with a wrench, suitable for mountain bike crankshafts and used to disassemble knurled crankshafts. Easy to operate and very suitable for bicycle maintenance. 2、Arm remover, extended ejector, used to remove chain links and cranks, very suitable for cone crank sets, combined with wrench crank puller removal tool. 3、The bottom bracket remover with 20 teeth is used to remove the bottom bracket of the bicycle. The high-strength steel structure is very durable. 4、The bicycle chain cutter have compact and portable designs, comfortable to operate and easy to chain. Specially designed to remove and install chain bolts. 5、Bicycle chain tools can be used for all kinds of bicycles, including mountain bicycles, road bicycles, foldable bicycles, children's bicycles or ordinary daily bicycles and so on. Due to its light weight, the bicycle chain repair tool kit can be carried even when riding. Item Type: Bicycle Repair Tool Kit Material: High-strength steel Size: Hex Wrench: Approx. 15.6cm / 6.1in, 16mm / 0.6in Arm Remover: Approx. 7.8cm / 3.1in Bottom Bracket Remover: Approx. 5 x 3cm / 2 x 1.2in Chain Cutter: Approx. 10.4 x 4.8cm / 4.1 x 1.9in Suitable For: Mountain bike/road bike 1 x Wrench 1 x Chain Cutter 1 x Bottom Bracket Remover 1 x Arm Remover