There are basically two types of wrenches or spanners, one is a wrench that has fixed opening size marked on it, while the other is a wrench with adjuastable opening size. 

The CCAS Adjustable Hook Spanners facilitate the easy and safe tightening and loosening of KM, KML, N, AN, KMK, KMFE and KMT nuts. The spanners are made of special hardened steel for durability. One hook spanner covers several nut sizes, making it suitable for use with many applications.

Features of Adjustable Hook Wrenches:

1. Money-saving solution: 1 hook wrench covers several nut sizes

2. Versatile: suitable for N, AN, KM, KNL, KMK, KMFE & KMT nuts

3. Hole in the adjustable hook wrench's handle facilitates easy storage

4. High-quality material provides maximum strength and durability
   

5. Minimizes shafts and nuts damage
   

Both fixed and adjustable hook spanners/wrenches are available.

CCAS Bearing Ltd is a professional and experienced manufacturer and trader specialized in producing and supplying adapter sleeves, withdrawal sleeves, plummer blocks, pillow blocks, lock nuts, lock washers, precision lock nuts, hydraulic nuts, clamping elements, hook spanners, bearings and accessories. Not only we have two factories, we have also established excellent cooperative relations with more than 200 bearing-related-product manufacturers in China.

CCAS is your ideal and reliable ONE-STOP bearing accessories supplier. It is our pleasure to provide you products that feature the quality, durability, service and good prices you expect.